Snippet for PHP_CodeSniffer Sniff Test Line Number Fixing

gistfile1.php

<?php
/**
 * Example input code:
 *
 * 45 => 2,
 * 11 => 1,
 *
 * // Some comment to ignore.
 * 100 => 12, 
 */

$line_number_modificator = $_GET['line_number_modificator']; // e.g. "+1" or "-12"
$lines = array_map('trim', explode("\n", $_GET['source_text'];

foreach ( $lines as $i => $line ) {
	if ( substr($line, 0, 2) == '//' || strlen($line) == 0 ) {
		// Skip comments or empty lines.
		continue;
	}

	if ( preg_match('/^([\d]+)(.*)=>(.*)$/', $line, $regs) ) {
		$lines[$i] = array_sum(array($regs[1], $line_number_modificator)) . $regs[2] . '=>' . $regs[3];
	}

}

echo htmlspecialchars(implode("\n", $lines));

Example file where you can see these numbers: https://github.com/squizlabs/PHP_CodeSniffer/blob/master/CodeSniffer/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.php