Add Str::replaceFirst, replaceLast and corresponding helpers to Laravel 5.1 LTS

Str-replaceFirst-replaceLast.php

<?php

use Illuminate\Support\Str;


Str::macro('replaceFirst', function ($search, $replace, $subject) {

	$position = strpos($subject, $search);

	if ($position !== false) {
		return substr_replace($subject, $replace, $position, strlen($search));
	}

	return $subject;
});


Str::macro('replaceLast', function ($search, $replace, $subject) {

	$position = strrpos($subject, $search);

	if ($position !== false) {
		return substr_replace($subject, $replace, $position, strlen($search));
	}

	return $subject;
});


if (! function_exists('str_replace_first')) {

	function str_replace_first($search, $replace, $subject)
	{
		return Str::replaceFirst($search, $replace, $subject);
	}
}


if (! function_exists('str_replace_last')) {

	function str_replace_last($search, $replace, $subject)
	{
		return Str::replaceLast($search, $replace, $subject);
	}
}