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PHP7調査(30)preg_replace_callback_array関数の新設

Last updated at Posted at 2015-05-12

preg_replace_callback_array()という新しい関数がPHP7から実装されました。要は配列を受け取れるバージョンのpreg_replace_callback()です。

<?php
$str = 'aBcDeF';
$str = preg_replace_callback_array([
        '/[ace]/' => function ($m) { return strtoupper($m[0]); },
        '/[BDF]/' => function ($m) { return strtolower($m[0]); },
    ], $str);
var_dump($str); // string(6) "AbCdEf"

preg_replace()は複数組の置換を一気に書けるのにpreg_replace_callback()だと書けないという問題意識から作られた関数のようです。でも、そんなに必要かなあ…?

#参照

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