php-delete-line-in-file.php

<?php 
	
function deleteLineInFile($file,$string)
{
	$i=0;$array=array();
	
	$read = fopen($file, "r") or die("can't open the file");
	while(!feof($read)) {
		$array[$i] = fgets($read);	
		++$i;
	}
	fclose($read);
	
	$write = fopen($file, "w") or die("can't open the file");
	foreach($array as $a) {
		if(!strstr($a,$string)) fwrite($write,$a);
	}
	fclose($write);
}

?>