<?php
$value1='content1';
$value2='content2';
?>

<?php
// name of file that you want to save the content in
$fileName = 'codefile.php';
 
// Load code from filename
$code = file_get_contents($fileName);
 
// Extract PHP tags with str_replace
$array_strip_tags = array('');
$array_strip_with = array('', '', '');
$code = str_replace( $array_strip_tags, $array_strip_with, $code );
 
// Execute code from file and import $value1 and $value2 into the GLOBAL namespace
eval( $code );
 
// Load values sent from the form (and check if form was submitted)
$submitted = isset($_POST['submitted'])?$_POST['submitted']:false;
$strValue1 = isset($_POST['submitted'])?$_POST['value1']:$value1;
$strValue2 = isset($_POST['submitted'])?$_POST['value2']:$value2;
 
// If the form was submitted save the file with the new data
if ($submitted) {
	// Create string in heredoc syntax
	$strToSave = <<<RTT;
<?php
\$value1='$strValue1';
\$value2='$strValue2';
?>
RTT;
	// Save string to file
		$return = @file_put_contents($fileName, $strToSave);
	// Set success or error message
	if ($return) {
		$errorMessage = 'File was saved sucesfully';
	} else {
		$errorMessage = 'There was an error saving the file! Check file permissions.';
	}
}
 
?>
<form method="post" action="<?=$PHP_SELF?>">
<fieldset>
<legend>Change values from PHP - form</legend>
< ?php if (isset($errorMessage) && strlen($errorMessage) > 0): ?><span>< ?=$errorMessage?></span>
< ?php endif; ?>
<input type="hidden" value="1" name="submitted" />
<label for="value1">Value 1:</label><input type="text" value="<?=$strValue1?/>" name="value1" /><br />
<label for="value2">Value 2:</label><input type="text" value="<?=$strValue2?/>" name="value2" /><br />
<input type="submit" value="Submit" />
</fieldset>
</form>