array bugs?

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  • 7h@ch
    #1

    array bugs?


    Sorry if I sounds like a noob (because I am one, here). I ran across
    this earlier, and it kept bugging me. I guess someone here know a good
    answer.

    To summerize, I was using array within a class. After some
    manipulation, the value of the array's element that I needed wasn't
    "echoed" right.

    For instance,

    class FootballClub
    {
    public $name;
    public $stadium = "junkyard";
    public $roster = array("gk"=>"cl own", "st"=>"fool ");
    public $coach;
    }

    $myclub = new FootballClub();
    $myclub->name = "Liverpool" ;

    if ($myclub->name == "Liverpool" )
    {
    $myclub->stadium = "Anfield";
    $myclub->coach = "Rafa Benitez";
    $myclub->roster["gk"] = "Pepe Reina";
    $myclub->roster["st"] = "Robbie Fowler";
    }


    $myplayer = $myclub->roster[gk];
    echo "your team plays at: $myclub->stadium<br>" ;
    echo "your goal keeper is: $myclub->roster[gk]<br>");

    ---------
    Problem:

    As is, the 2nd line output is: "your goal keeper is: Array[gk]" thought
    $myplayer gets the right value.

    Any plausible explaination, please?

    Thanks.

    Tags: None
    • Miguel Cruz
      #2
      Re: array bugs?

      "7h@ch" <essetm@gmail.c omwrote:
      echo "your goal keeper is: $myclub->roster[gk]<br>");
      >
      As is, the 2nd line output is: "your goal keeper is: Array[gk]"
      echo "your goal keeper is: {$myclub->roster['gk']}<br>");

      Note the curly braces and quotes.

      miguel
      --
      Photos from 40 countries on 5 continents: http://travel.u.nu
      Latest photos: Malaysia; Thailand; Singapore; Spain; Morocco
      Airports of the world: http://airport.u.nu

        Comment

        • Rik
          #3
          Re: array bugs?

          Miguel Cruz wrote:
          "7h@ch" <essetm@gmail.c omwrote:
          >echo "your goal keeper is: $myclub->roster[gk]<br>");
          >>
          >As is, the 2nd line output is: "your goal keeper is: Array[gk]"
          >
          echo "your goal keeper is: {$myclub->roster['gk']}<br>");
          >
          Note the curly braces and quotes.
          Yup, see Complex (curly) syntax:
          PHP: Strings - Manual
          http://www.php.net/manual/en/language.types.string.php#language.types.string.parsing.complex
          Strings


          Grtz,
          --
          Rik Wasmus


            Comment

            • s a n j a y
              #4
              Re: array bugs?

              7h@ch wrote:
              Sorry if I sounds like a noob (because I am one, here). I ran across
              this earlier, and it kept bugging me. I guess someone here know a good
              answer.
              >
              To summerize, I was using array within a class. After some
              manipulation, the value of the array's element that I needed wasn't
              "echoed" right.
              >
              For instance,
              >
              class FootballClub
              {
              public $name;
              public $stadium = "junkyard";
              public $roster = array("gk"=>"cl own", "st"=>"fool ");
              public $coach;
              }
              >
              $myclub = new FootballClub();
              $myclub->name = "Liverpool" ;
              >
              if ($myclub->name == "Liverpool" )
              {
              $myclub->stadium = "Anfield";
              $myclub->coach = "Rafa Benitez";
              $myclub->roster["gk"] = "Pepe Reina";
              $myclub->roster["st"] = "Robbie Fowler";
              }
              >
              >
              $myplayer = $myclub->roster[gk];
              echo "your team plays at: $myclub->stadium<br>" ;
              echo "your goal keeper is: $myclub->roster[gk]<br>");
              >
              ---------
              Problem:
              >
              As is, the 2nd line output is: "your goal keeper is: Array[gk]" thought
              $myplayer gets the right value.
              >
              Any plausible explaination, please?
              >
              Thanks.
              >
              Although not strictly necessary in php, always put your variables
              outside of quotes. This came to me easily as I was developing in c and
              C++ before I moved on to PHP.

                Comment

                • Shelly
                  #5
                  Re: array bugs?


                  "s a n j a y" <sanjay.debian@ gmail.comwrote in message
                  news:NaCdnUAhAv Wsg0vZnZ2dnUVZ_ qydnZ2d@comcast .com...
                  7h@ch wrote:
                  >Sorry if I sounds like a noob (because I am one, here). I ran across
                  >this earlier, and it kept bugging me. I guess someone here know a good
                  >answer.
                  >>
                  >To summerize, I was using array within a class. After some
                  >manipulation , the value of the array's element that I needed wasn't
                  >"echoed" right.
                  >>
                  >For instance,
                  >>
                  >class FootballClub
                  >{
                  >public $name;
                  >public $stadium = "junkyard";
                  >public $roster = array("gk"=>"cl own", "st"=>"fool ");
                  >public $coach;
                  >}
                  >>
                  >$myclub = new FootballClub();
                  >$myclub->name = "Liverpool" ;
                  >>
                  >if ($myclub->name == "Liverpool" )
                  >{
                  >$myclub->stadium = "Anfield";
                  >$myclub->coach = "Rafa Benitez";
                  >$myclub->roster["gk"] = "Pepe Reina";
                  >$myclub->roster["st"] = "Robbie Fowler";
                  >}
                  >>
                  >>
                  >$myplayer = $myclub->roster[gk];
                  >echo "your team plays at: $myclub->stadium<br>" ;
                  >echo "your goal keeper is: $myclub->roster[gk]<br>");
                  >>
                  > ---------
                  > Problem:
                  >>
                  >As is, the 2nd line output is: "your goal keeper is: Array[gk]" thought
                  >$myplayer gets the right value.
                  >>
                  >Any plausible explaination, please?
                  >>
                  >Thanks.
                  >>
                  >
                  Although not strictly necessary in php, always put your variables outside
                  of quotes. This came to me easily as I was developing in c and C++ before
                  I moved on to PHP.
                  Hmm. I looke at someone else's answer of putting braces in. I thought to
                  myself, "Great, I just learned something by reading this newgroup. Store it
                  away". When I saw your response I thought to myself "Why hadn't I come
                  across this problem before, myself?". Well, your answer showed me why. I
                  would have written it as:

                  echo "your goal keeper is:" . $myclub->roster['gk'] . "<br>";

                  and never have had that difficulty. My background in C and java developed
                  that same habit in me.

                  Shelly


                    Comment

                    • Rik
                      #6
                      Re: array bugs?

                      Shelly wrote:
                      "s a n j a y" <sanjay.debian@ gmail.comwrote in message
                      news:NaCdnUAhAv Wsg0vZnZ2dnUVZ_ qydnZ2d@comcast .com...
                      >7h@ch wrote:
                      >>Sorry if I sounds like a noob (because I am one, here). I ran across
                      >>this earlier, and it kept bugging me. I guess someone here know a
                      >>good answer.
                      >>>
                      >>To summerize, I was using array within a class. After some
                      >>manipulatio n, the value of the array's element that I needed wasn't
                      >>"echoed" right.
                      >>>
                      >>For instance,
                      >>>
                      >>class FootballClub
                      >>{
                      >>public $name;
                      >>public $stadium = "junkyard";
                      >>public $roster = array("gk"=>"cl own", "st"=>"fool ");
                      >>public $coach;
                      >>}
                      >>>
                      >>$myclub = new FootballClub();
                      >>$myclub->name = "Liverpool" ;
                      >>>
                      >>if ($myclub->name == "Liverpool" )
                      >>{
                      >>$myclub->stadium = "Anfield";
                      >>$myclub->coach = "Rafa Benitez";
                      >>$myclub->roster["gk"] = "Pepe Reina";
                      >>$myclub->roster["st"] = "Robbie Fowler";
                      >>}
                      >>>
                      >>>
                      >>$myplayer = $myclub->roster[gk];
                      >>echo "your team plays at: $myclub->stadium<br>" ;
                      >>echo "your goal keeper is: $myclub->roster[gk]<br>");
                      >>>
                      >> ---------
                      >> Problem:
                      >>>
                      >>As is, the 2nd line output is: "your goal keeper is: Array[gk]"
                      >>thought $myplayer gets the right value.
                      >>>
                      >>Any plausible explaination, please?
                      >>>
                      >>Thanks.
                      >>>
                      >>
                      >Although not strictly necessary in php, always put your variables
                      >outside of quotes. This came to me easily as I was developing in c
                      >and C++ before I moved on to PHP.
                      >
                      Hmm. I looke at someone else's answer of putting braces in. I
                      thought to myself, "Great, I just learned something by reading this
                      newgroup. Store it away". When I saw your response I thought to
                      myself "Why hadn't I come across this problem before, myself?".
                      Well, your answer showed me why. I would have written it as:
                      >
                      echo "your goal keeper is:" . $myclub->roster['gk'] . "<br>";
                      >
                      and never have had that difficulty. My background in C and java
                      developed that same habit in me.
                      It could be done like that, for sure (allthough I'd use single quotes for
                      text without variables & newlines). When outputting HTML tags however, it
                      can become a complete quote-fest, that I'd rather avoid to improve
                      legibility. Heredoc & curly often come to the rescue, allthough certainly
                      for numberformattin g, but also for strings, (s/v)printf() is certainly an
                      outcome.

                      Consider:
                      array product{
                      [id] =>.....
                      [name] =>...
                      [decription] =...
                      [image_src] =...
                      .....
                      }

                      Concating way:

                      echo '
                      <h2>'.$produc t['id'].':'.$product['name'].'</h2>
                      <p>
                      <a href="./products/?id='.$product['id'].'"><img
                      src="'.$product['image_src'].'" /></a>
                      '.$product['decscription'].'
                      let\'s say way have to use singel quote\'s here... escaping?
                      Read more about <a
                      href="./products/?id='.$product['id'].'">'.$produc t['name'].'</a>
                      </p>';

                      Double quotes, curly:

                      echo "
                      <h2>{$product['id']}:{$product['name']}</h2>
                      <p>
                      <a href=\"./products/?id={$product['id']}\"><img
                      src=\"{$product['image_src']}\" /></a>
                      {$product['decscription']}
                      let's say way have to use singel quote's here... escaping?
                      Read more about <a
                      href=\"./products/?id={$product['id']}\">{$product['name']}</a>
                      </p>';

                      Heredoc, curly

                      echo <<<HTML
                      <h2>{$product['id']}:{$product['name']}</h2>
                      <p>
                      <a href="./products/?id={$product['id']}"><img
                      src="{$product['image_src']}" /></a>
                      {$product['decscription']}
                      let's say way have to use singel quote's here... escaping?
                      Read more about <a
                      href="./products/?id={$product['id']}">{$product['name']}</a>
                      </p>
                      HTML;

                      Printf possibility:

                      vprintf(<<<HTML
                      <h2>%1$03d:%2$s </h2>
                      <p>
                      <a href="./products/?id=%1$d"><img src="%4$s" /></a>
                      %3$s
                      let's say way have to use single quote's here... escaping?
                      Read more about <a href="./products/?id=%1$d">%2$s</a>
                      </p>
                      HTML;
                      , $products);



                      The latter one might come in handywhen outputting a list from an array
                      (allthough the code isn't really charming):

                      $list = array('page 1','page 2','page 3'....
                      vprintf(str_rep eat("\n<li>%s</li>", count($list)),$ list);

                      It's all about legibility, what you're actually doing, wether it has to be
                      easily maintained and wether it's a repeating output.

                      Grtz,
                      --
                      Rik Wasmus


                        Comment

                        • Shelly
                          #7
                          Re: array bugs?


                          "Rik" <luiheidsgoeroe @hotmail.comwro te in message
                          news:6dc6b$44d6 4f53$8259c69c$2 4012@news1.tude lft.nl...
                          Shelly wrote:
                          >"s a n j a y" <sanjay.debian@ gmail.comwrote in message
                          >news:NaCdnUAhA vWsg0vZnZ2dnUVZ _qydnZ2d@comcas t.com...
                          >>7h@ch wrote:
                          >>>Sorry if I sounds like a noob (because I am one, here). I ran across
                          >>>this earlier, and it kept bugging me. I guess someone here know a
                          >>>good answer.
                          >>>>
                          >>>To summerize, I was using array within a class. After some
                          >>>manipulation , the value of the array's element that I needed wasn't
                          >>>"echoed" right.
                          >>>>
                          >>>For instance,
                          >>>>
                          >>>class FootballClub
                          >>>{
                          >>>public $name;
                          >>>public $stadium = "junkyard";
                          >>>public $roster = array("gk"=>"cl own", "st"=>"fool ");
                          >>>public $coach;
                          >>>}
                          >>>>
                          >>>$myclub = new FootballClub();
                          >>>$myclub->name = "Liverpool" ;
                          >>>>
                          >>>if ($myclub->name == "Liverpool" )
                          >>>{
                          >>>$myclub->stadium = "Anfield";
                          >>>$myclub->coach = "Rafa Benitez";
                          >>>$myclub->roster["gk"] = "Pepe Reina";
                          >>>$myclub->roster["st"] = "Robbie Fowler";
                          >>>}
                          >>>>
                          >>>>
                          >>>$myplayer = $myclub->roster[gk];
                          >>>echo "your team plays at: $myclub->stadium<br>" ;
                          >>>echo "your goal keeper is: $myclub->roster[gk]<br>");
                          >>>>
                          >>> ---------
                          >>> Problem:
                          >>>>
                          >>>As is, the 2nd line output is: "your goal keeper is: Array[gk]"
                          >>>thought $myplayer gets the right value.
                          >>>>
                          >>>Any plausible explaination, please?
                          >>>>
                          >>>Thanks.
                          >>>>
                          >>>
                          >>Although not strictly necessary in php, always put your variables
                          >>outside of quotes. This came to me easily as I was developing in c
                          >>and C++ before I moved on to PHP.
                          >>
                          >Hmm. I looke at someone else's answer of putting braces in. I
                          >thought to myself, "Great, I just learned something by reading this
                          >newgroup. Store it away". When I saw your response I thought to
                          >myself "Why hadn't I come across this problem before, myself?".
                          >Well, your answer showed me why. I would have written it as:
                          >>
                          >echo "your goal keeper is:" . $myclub->roster['gk'] . "<br>";
                          >>
                          >and never have had that difficulty. My background in C and java
                          >developed that same habit in me.
                          >
                          It could be done like that, for sure (allthough I'd use single quotes for
                          text without variables & newlines). When outputting HTML tags however, it
                          can become a complete quote-fest, that I'd rather avoid to improve
                          legibility. Heredoc & curly often come to the rescue, allthough certainly
                          for numberformattin g, but also for strings, (s/v)printf() is certainly an
                          outcome.
                          Sometimes I use single and sometimes double if there is no necessity to
                          choose between them. See below.
                          >
                          Consider:
                          array product{
                          [id] =>.....
                          [name] =>...
                          [decription] =...
                          [image_src] =...
                          .....
                          }
                          >
                          Concating way:
                          >
                          echo '
                          <h2>'.$produc t['id'].':'.$product['name'].'</h2>
                          <p>
                          <a href="./products/?id='.$product['id'].'"><img
                          src="'.$product['image_src'].'" /></a>
                          '.$product['decscription'].'
                          let\'s say way have to use singel quote\'s here... escaping?
                          Read more about <a
                          href="./products/?id='.$product['id'].'">'.$produc t['name'].'</a>
                          </p>';
                          Here I would do the preceding without needing escapes:

                          echo ' <h2>' . $product['id'] . ':' .$product['name'] .
                          '</h2><p><a href="./products/?id=' . $product['id'] . '" ><img src="' .
                          $product['image_src'] . '" /></a>' . $product['decscription'] .
                          "let's say way have to use single quote's here... escaping?Read more
                          about <a " .
                          'href="/products/?id=' . $product['id'] . '">' . $product['name'] .
                          '</a></p>';

                          Putting in spaces between the concatonation dots greatly improves
                          legibility. Also, not needing the extra escape character (when it can be
                          avoided) also does that.
                          >
                          Double quotes, curly:
                          >
                          echo "
                          <h2>{$product['id']}:{$product['name']}</h2>
                          <p>
                          <a href=\"./products/?id={$product['id']}\"><img
                          src=\"{$product['image_src']}\" /></a>
                          {$product['decscription']}
                          let's say way have to use singel quote's here... escaping?
                          Read more about <a
                          href=\"./products/?id={$product['id']}\">{$product['name']}</a>
                          </p>';
                          >
                          Heredoc, curly
                          >
                          echo <<<HTML
                          <h2>{$product['id']}:{$product['name']}</h2>
                          <p>
                          <a href="./products/?id={$product['id']}"><img
                          src="{$product['image_src']}" /></a>
                          {$product['decscription']}
                          let's say way have to use singel quote's here... escaping?
                          Read more about <a
                          href="./products/?id={$product['id']}">{$product['name']}</a>
                          </p>
                          HTML;
                          >
                          Printf possibility:
                          >
                          vprintf(<<<HTML
                          <h2>%1$03d:%2$s </h2>
                          <p>
                          <a href="./products/?id=%1$d"><img src="%4$s" /></a>
                          %3$s
                          let's say way have to use single quote's here... escaping?
                          Read more about <a href="./products/?id=%1$d">%2$s</a>
                          </p>
                          HTML;
                          , $products);
                          >
                          >
                          >
                          The latter one might come in handywhen outputting a list from an array
                          (allthough the code isn't really charming):
                          >
                          $list = array('page 1','page 2','page 3'....
                          vprintf(str_rep eat("\n<li>%s</li>", count($list)),$ list);
                          >
                          It's all about legibility, what you're actually doing, wether it has to be
                          easily maintained and wether it's a repeating output.
                          I agree with this last statement 100%. That is why I always put in a spaces
                          where possible and end the first line with the concatonation dot to and
                          start the second line in the right indent position.

                          Shelly


                            Comment

                            • 7h@ch
                              #8
                              Re: array bugs?


                              Thanks all.

                              Guess I gotta take out some of the sloppy coding habits ;-)

                                Comment

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