Problems with STRSTR function

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  • Chris
    #1

    Problems with STRSTR function

    Applogies for repost. For some reason the second half of my message
    got chopped off... here's the full this agin (hopefully!)

    I'm having a problem with the strstr function that is driving me up
    the ?!**!?! wall!

    OK, I hope the following sample code will illustrate the problem.

    <?

    $exif = read_exif_data_ raw($HTTP_POST_ FILES['image']['tmp_name'],0);

    echo '<hr><b>Exampl e 1</b><br>This is the test using fields from the
    exif data<hr>';

    $make=$exif['IFD0']['Make'];
    $model=$exif['IFD0']['Model'];

    echo "$make<br>" ;
    echo "$model<br><br> ";

    if(stristr($mod el,$make))
    {
    echo "true<br><b r>";
    }
    else
    {
    echo "false<br><br>" ;
    }

    echo '<hr><b>Exampl e 2</b><br>This is the test using manual data<hr>';

    $make="Canon";
    $model="Canon EOS300D DIGITAL";

    echo "$make<br>" ;
    echo "$model<br><br> ";

    if(stristr($mod el,$make))
    {
    echo "true<br><b r>";
    }
    else
    {
    echo "false<br><br>" ;
    }

    ?>


    And here is the out put:

    Example 1
    This is the test using fields from the exif data
    Canon
    Canon EOS 300D DIGITAL

    false

    Example 2
    This is the test using manual data
    Canon
    Canon EOS300D DIGITAL

    true

    This is some code called by a form that uploads an image. In the first
    example I am reading in two variables from the EXIF data using a
    function from http://www.offsky.com/software/exif/index.php. I am then
    comparing the contents of the two fields. the first field contains
    "Canon" (in the variable $make) and the second contains "Canon EOS300D
    DIGITAL" (in the variable $model). But for some reason it returns
    false. In the second example I am entering exactly the same data into
    the $make and $model variables manually. This time true is return as
    expected. The echo statements confirm that the $make and $model
    variable contain the same data in both examples. Can anyone offer an
    explanation/solution and save my sanity??

    Thanks in advance, Chris
    Tags: None
    • Herb Kauhry
      #2
      Re: Problems with STRSTR function

      Probably a ASCII nul character (0) terminating the string stored in $make
      (or possibly #x160)

      --

      "Chris" <cjas@blueyonde r.co.uk> wrote in message
      news:b71c3a04.0 312080728.62ec8 731@posting.goo gle.com...[color=blue]
      > Applogies for repost. For some reason the second half of my message
      > got chopped off... here's the full this agin (hopefully!)
      >
      > I'm having a problem with the strstr function that is driving me up
      > the ?!**!?! wall!
      >
      > OK, I hope the following sample code will illustrate the problem.
      >
      > <?
      >
      > $exif = read_exif_data_ raw($HTTP_POST_ FILES['image']['tmp_name'],0);
      >
      > echo '<hr><b>Exampl e 1</b><br>This is the test using fields from the
      > exif data<hr>';
      >
      > $make=$exif['IFD0']['Make'];
      > $model=$exif['IFD0']['Model'];
      >
      > echo "$make<br>" ;
      > echo "$model<br><br> ";
      >
      > if(stristr($mod el,$make))
      > {
      > echo "true<br><b r>";
      > }
      > else
      > {
      > echo "false<br><br>" ;
      > }
      >
      > echo '<hr><b>Exampl e 2</b><br>This is the test using manual data<hr>';
      >
      > $make="Canon";
      > $model="Canon EOS300D DIGITAL";
      >
      > echo "$make<br>" ;
      > echo "$model<br><br> ";
      >
      > if(stristr($mod el,$make))
      > {
      > echo "true<br><b r>";
      > }
      > else
      > {
      > echo "false<br><br>" ;
      > }
      >
      > ?>
      >
      >
      > And here is the out put:
      >
      > Example 1
      > This is the test using fields from the exif data
      > Canon
      > Canon EOS 300D DIGITAL
      >
      > false
      >
      > Example 2
      > This is the test using manual data
      > Canon
      > Canon EOS300D DIGITAL
      >
      > true
      >
      > This is some code called by a form that uploads an image. In the first
      > example I am reading in two variables from the EXIF data using a
      > function from http://www.offsky.com/software/exif/index.php. I am then
      > comparing the contents of the two fields. the first field contains
      > "Canon" (in the variable $make) and the second contains "Canon EOS300D
      > DIGITAL" (in the variable $model). But for some reason it returns
      > false. In the second example I am entering exactly the same data into
      > the $make and $model variables manually. This time true is return as
      > expected. The echo statements confirm that the $make and $model
      > variable contain the same data in both examples. Can anyone offer an
      > explanation/solution and save my sanity??
      >
      > Thanks in advance, Chris[/color]


        Comment

        • Chung Leong
          #3
          Re: Problems with STRSTR function

          My guess is that the data is stored as Unicode-16. Do a strlen() on $make
          and $model and see if they're not longer than you expected.

          Uzytkownik "Chris" <cjas@blueyonde r.co.uk> napisal w wiadomosci
          news:b71c3a04.0 312080728.62ec8 731@posting.goo gle.com...[color=blue]
          > Applogies for repost. For some reason the second half of my message
          > got chopped off... here's the full this agin (hopefully!)
          >
          > I'm having a problem with the strstr function that is driving me up
          > the ?!**!?! wall!
          >
          > OK, I hope the following sample code will illustrate the problem.
          >
          > <?
          >
          > $exif = read_exif_data_ raw($HTTP_POST_ FILES['image']['tmp_name'],0);
          >
          > echo '<hr><b>Exampl e 1</b><br>This is the test using fields from the
          > exif data<hr>';
          >
          > $make=$exif['IFD0']['Make'];
          > $model=$exif['IFD0']['Model'];
          >
          > echo "$make<br>" ;
          > echo "$model<br><br> ";
          >
          > if(stristr($mod el,$make))
          > {
          > echo "true<br><b r>";
          > }
          > else
          > {
          > echo "false<br><br>" ;
          > }
          >
          > echo '<hr><b>Exampl e 2</b><br>This is the test using manual data<hr>';
          >
          > $make="Canon";
          > $model="Canon EOS300D DIGITAL";
          >
          > echo "$make<br>" ;
          > echo "$model<br><br> ";
          >
          > if(stristr($mod el,$make))
          > {
          > echo "true<br><b r>";
          > }
          > else
          > {
          > echo "false<br><br>" ;
          > }
          >
          > ?>
          >
          >
          > And here is the out put:
          >
          > Example 1
          > This is the test using fields from the exif data
          > Canon
          > Canon EOS 300D DIGITAL
          >
          > false
          >
          > Example 2
          > This is the test using manual data
          > Canon
          > Canon EOS300D DIGITAL
          >
          > true
          >
          > This is some code called by a form that uploads an image. In the first
          > example I am reading in two variables from the EXIF data using a
          > function from http://www.offsky.com/software/exif/index.php. I am then
          > comparing the contents of the two fields. the first field contains
          > "Canon" (in the variable $make) and the second contains "Canon EOS300D
          > DIGITAL" (in the variable $model). But for some reason it returns
          > false. In the second example I am entering exactly the same data into
          > the $make and $model variables manually. This time true is return as
          > expected. The echo statements confirm that the $make and $model
          > variable contain the same data in both examples. Can anyone offer an
          > explanation/solution and save my sanity??
          >
          > Thanks in advance, Chris[/color]


            Comment

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