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run code in 300+ PHP versions simultaneously
<?php function foo() { $reqs = array('11', '22', array('id' => 123, 'name' => 'ffff')); foreach ($reqs as &$req) { if (is_array($req)) { $req['name'] = 'dd'; //alter value } } echo '<pre>'; print_r($reqs); //values changed, ok echo '</pre>'; foreach ($reqs as $req) { echo '<pre>'; print_r($req); //the last value is '22', that is wrong. echo '</pre>'; } } foo();
Output for 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.14
<pre>Array ( [0] => 11 [1] => 22 [2] => Array ( [id] => 123 [name] => dd ) ) </pre><pre>11</pre><pre>22</pre><pre>22</pre>
preferences:
169.99 ms | 408 KiB | 5 Q