Read and Write file contents

**nathj** · Aug 2 '07, 08:33 AM

Originally posted by pradeepjain

i am jst executing the code i passed u in browser by giving http://localhost/i.html is there any other php settings tht i hve to do..

Do you have php installed?

what happens if you have page called test.php that has only the following code in it:

[php]
<?php phpInfo() ;?>
[/php]

Run this via //localhost/test.php and tell me what you get on screen.

Also, what web server and O/S are you running on? There are somethingns you need to set up in IIS to get php to work.

Cheers
nathj

**pradeepjain** · Aug 2 '07, 04:00 PM

Originally posted by nathj

Do you have php installed?

what happens if you have page called test.php that has only the following code in it:

[php]
<?php phpInfo() ;?>
[/php]

Run this via //localhost/test.php and tell me what you get on screen.

Also, what web server and O/S are you running on? There are somethingns you need to set up in IIS to get php to work.

Cheers
nathj

i did as u said it gave me a blank screen...

i am using linux os and apache server...

which php to install and how and wht r the conf details

**nathj** · Aug 2 '07, 04:15 PM

Originally posted by pradeepjain

i did as u said it gave me a blank screen...

i am using linux os and apache server...

which php to install and how and wht r the conf details

Hi,

How frustrating, after all this you don't have PHP installed!

You need to go to the main php site and figure this out there, unless someone else can help. I am running PHP on Windows and have never used Linux. The instal process for Windows uses an msi and is all self explanatory.

Perhaps you could post another question asking for help installing php on linux, I know the LAMP (Linux Apache, MySQL, PHP) combination is very popular (if not the most popular) so you will be able to get some help on that. Though ask the question without mentioing this thread.

Hopefully, once installed your code should work fine.

I hope you get this resolved in time - the code will work once the environment is in place.

Cheers
nathj

**pradeepjain** · Aug 3 '07, 03:17 PM

[HTML]<html>
<head>
</head>
<body>
<?php

$filehandle = fopen("welcome. txt","r");

if(filesize("we lcome.txt")=='0 ')
{
echo "file empty";
}
else
{
$line=true;

echo '<form method=post action=action.p hp>';

while($filehand le && $line)

{

$line = fgets($filehand le);

if (!empty($line))

{

$str = explode(':', $line);

echo $str[0] . ': <input type="text" name="'.$str[0].'" value="'.$str[1].'"><br />';

}

}

echo '<input type=submit value= submit>';

echo '</form>';
}
?>

</body>
</html>

[/HTML]

yahoo !!! the read part is working correctly....

but now writing back to file???

$POST wll do it but the name of the text box???

any ideas on this...

**nathj** · Aug 3 '07, 04:44 PM

Originally posted by pradeepjain

yahoo !!! the read part is working correctly....

but now writing back to file???

$POST wll do it but the name of the text box???

any ideas on this...

Glad we finally got there on that.

As for writing back to the file the $_POST variable is really an array, so you can loop through the array and then write to file when you hit a key() value of name or location. This should sort you out nicely.

Have a go and if you get stuck post the code you've got and I'll have a play around with it.

Cheers
nathj

**pradeepjain** · Aug 4 '07, 02:43 AM

Originally posted by nathj

Glad we finally got there on that.

As for writing back to the file the $_POST variable is really an array, so you can loop through the array and then write to file when you hit a key() value of name or location. This should sort you out nicely.

Have a go and if you get stuck post the code you've got and I'll have a play around with it.

Cheers
nathj

i did not get ur point...i can use $POST but whts the variable name to use ....bcos while reading i am using only str[0] for variable name. ..i need to use implode function rite!!...

**pradeepjain** · Aug 4 '07, 04:01 AM

Originally posted by nathj

Glad we finally got there on that.

As for writing back to the file the $_POST variable is really an array, so you can loop through the array and then write to file when you hit a key() value of name or location. This should sort you out nicely.

Have a go and if you get stuck post the code you've got and I'll have a play around with it.

Cheers
nathj

u explian me how to do it...and i hve tht of this also...i wll use a count variable while reading and use name [count]=$str[0] and value[count] =$str[1] insie the while loop and as soon as we enter keep incrimenting count..
so tht its jst matter of for loop and implode in write function...

**nathj** · Aug 4 '07, 08:16 AM

Originally posted by pradeepjain

u explian me how to do it...and i hve tht of this also...i wll use a count variable while reading and use name [count]=$str[0] and value[count] =$str[1] insie the while loop and as soon as we enter keep incrimenting count..
so tht its jst matter of for loop and implode in write function...

The $_POST[] is really an associative array so yo ucan simply loop through it and for any thing where the key() is either name or location you can write an appropriate line to te text file.

Try something like:
[php]
foreach($_POST as $lcItem)
{
if (key() == 'name')
{
// write a line to the file using file functions
}
if (key() == 'location'
{
// write a line to the file using file functions
}
}
[/php]

I have not tried this, I am typing this whilst I play with my 9month old daughter - so that's me done for the weekend, I'll check back on monday.

Cheers
nathj

**pradeepjain** · Aug 4 '07, 11:35 AM

Originally posted by nathj

The $_POST[] is really an associative array so yo ucan simply loop through it and for any thing where the key() is either name or location you can write an appropriate line to te text file.

Try something like:
[php]
foreach($_POST as $lcItem)
{
if (key() == 'name')
{
// write a line to the file using file functions
}
if (key() == 'location'
{
// write a line to the file using file functions
}
}
[/php]

I have not tried this, I am typing this whilst I play with my 9month old daughter - so that's me done for the weekend, I'll check back on monday.

Cheers
nathj

wht u hve said is 100% correct ..but i cannot hard code it ....bcos i wll be not knowing wht is in the file i wll be jst knowing tht there is a file and there are 2 strings seperated by ":" .....so i wll be not knowing tht it has name ,place or something else...so i cannot use if (key() == 'name')........ i hve to dynamically read the names and write the content!!!!

**nathj** · Aug 6 '07, 06:52 AM

Originally posted by pradeepjain

wht u hve said is 100% correct ..but i cannot hard code it ....bcos i wll be not knowing wht is in the file i wll be jst knowing tht there is a file and there are 2 strings seperated by ":" .....so i wll be not knowing tht it has name ,place or something else...so i cannot use if (key() == 'name')........ i hve to dynamically read the names and write the content!!!!

Well in that case, the key() function can still be of use to you. You write to the file key(): $_POST[key()]. This should do the trick.

Cheers
nathj

**pradeepjain** · Aug 8 '07, 05:17 AM

guys thanks to all u who hve helped me....i finished my work

**nathj** · Aug 8 '07, 06:36 AM

Originally posted by pradeepjain

guys thanks to all u who hve helped me....i finished my work

I'm gald you got it working. Anytime you get stuck post back here - with your code and and your question.

Cheers
nathj

**pradeepjain** · Aug 8 '07, 08:44 AM

hii this is a new problem

I need to read a folder and then take the images from there and display it in such a way tht after a certain time the neaxt image has to be taken ..in the sense it has to rotate all the images...any basic idea to do it..

thanks
pradeep

**nathj** · Aug 8 '07, 12:30 PM

Originally posted by pradeepjain

hii this is a new problem

I need to read a folder and then take the images from there and display it in such a way tht after a certain time the neaxt image has to be taken ..in the sense it has to rotate all the images...any basic idea to do it..

thanks
pradeep

Based on this scant outline I would suggest that you need to investigate the directory functions in PHP. This would enable you to create an array of images. You could loop through this array using some sort of timer (note this example would need to be adapted to control when code is executed inside a loop).

I have never done anything like this, but this is how I would approach the problem.

My recommendation is to have a go with this, or any other bsae line idea. If you get stuck I would post your code and your problem to a new thread. This one has a lot of posts on it now and people may be put off by that so you could miss out on some better help.

Cheers
nathj

**pradeepjain** · Nov 29 '07, 07:36 AM

Originally posted by nathj

Based on this scant outline I would suggest that you need to investigate the directory functions in PHP. This would enable you to create an array of images. You could loop through this array using some sort of timer (note this example would need to be adapted to control when code is executed inside a loop).

I have never done anything like this, but this is how I would approach the problem.

My recommendation is to have a go with this, or any other bsae line idea. If you get stuck I would post your code and your problem to a new thread. This one has a lot of posts on it now and people may be put off by that so you could miss out on some better help.

Cheers
nathj

hiii i needed a small help on this plzz help
help on this

Read and Write file contents

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