<?php
$array =array(
"123,456,789"=> "1,1,1",
"333"=>"1",
"777"=>"1"
);
$keys = array_keys($array);
$matching_key = preg_grep("/\b333\b/", $keys);
var_dump($matching_key);
- Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
- array(1) {
[1]=>
int(333)
}
preferences:
211.02 ms | 405 KiB | 302 Q