PHP File Write at specific location

PHP write to a specific line

Write or replace a new content to a specific line within a file.

File Content(test1.txt)

A peaceful school makes a paceful student
A peaceful person makes a peaceful heart.
A peaceful heart
A peaceful world
A peaceful person
A peaceful community

Example 1:replace

<?php

$file = 'test1.txt';
$line_looking = 4;

$lines = file($file, FILE_IGNORE_NEW_LINES);
$lines[$line_looking] = 'Please, no violence!';
file_put_contents($file, implode("\n", $lines));
?>

Output

• Replace line 4 with Please, no violence!.

A peaceful school makes a paceful student
A peaceful person makes a peaceful heart.
A peaceful heart
A peaceful world
Please, no violence!
A peaceful community

Example 2: replace in a specific location

<?php

$file = 'test1.txt';
$line_looking = 4;

$lines = file($file, FILE_IGNORE_NEW_LINES);
$lines_tmp = array();

for ($i = 0; $i < count($lines); $i++) {
	if ($i == $line_looking) {
		$lines_tmp[] = 'Please of the word!!!!!';
		$lines_tmp[] = $lines[$i];
	} else {
		$lines_tmp[] = $lines[$i];
	}
}
file_put_contents($file, implode("\n", $lines_tmp));
?>

Output

A peaceful school makes a paceful student
A peaceful person makes a peaceful heart.
A peaceful heart
A peaceful world
Please of the word!!!!!
A peaceful person
A peaceful community

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• PHP File Access and File Templates
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