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PHP File System to Change Array Values

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Nov 18.2010

This has been bugging me for quite some time now, and I was wondering if any of you guys could help.

I’ve been trying to figure out how to change the value of variables inside an array using the PHP file system (like fopen or file_get_contents). And of course I need to be able to save the file when I’m through changing values. What makes it hard, is that I can’t get the variable by line number as it’s subject to change.

Is this even possible?

Thanks,
Scotty

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7 Comments(s) ↴

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@NogDogNov 18.2010 — Not 100% sure what you mean. Perhaps you could use an array along with serialize() and unserialize()? Or perhaps you could use an .ini file format along with the parse_ini_file() function?
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@ScottyBoyauthorNov 18.2010 — Okay, let me give you an example then.

Lets say I have this form:
<i>
</i>&lt;form action="update.php" action="post"&gt;
&lt;input type="text" name="input" /&gt;
&lt;input type="text" name="input2" /&gt;
&lt;/form&gt;


And I want to update the corresponding variables inside an array (which may already have values):
<i>
</i>$form_values = array(
'input' =&gt; 'value',
'input2' =&gt; 'value2'
);


I realize that I could use the global $_POST variable, but that's only good for one submission and it's gone. I need to somehow add the inputs into an array and save the file. I know you're probably thinking "Why doesn't he just use MySQL?". I'm planning on using this method to set MySQL connection variables in the future. i.e, define('DB_PASS', 'myPassword');. So as you can see, I can't add the values to a DB table if I haven't connected to one.

Thanks again,

Scotty
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@NogDogNov 18.2010 — How about PHP sessions with session_start() and the $_SESSION array?
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@ScottyBoyauthorNov 18.2010 — That would be good, except I need the changes to be permanent. And show for everyone, not just people who have submitted the form.

Have you hear of Simple Machines forum software? They somehow manage to do this with their installer script. I have looked at the source, but if confused me to death.
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@criterion9Nov 18.2010 — You might have a look at SimpleXml to see if it might suit your needs.
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@ScottyBoyauthorNov 18.2010 — Thank you. I'll try this later when I have a chance.
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@ehimeNov 19.2010 — Maybe?

[code=html]
<form action="update.php" action="post">
<input type="text" name="input" />
<input type="text" name="input2" />
</form>
[/code]

[code=php]
<?php

// update.php
$file = 'your.txt';
$form_values = array(
'input' => $_get['input'],
'input2' => $_get['input2'],
);

file_put_contents($file, $form_values, FILE_APPEND | LOCK_EX);

?>
[/code]
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