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run code in 500+ PHP versions simultaneously
<?php $string = "222\t55555\t9\thello\tbyebye\t444"; $newInt = 2; var_export( preg_replace("/\t[^\t]+\t\K\d+/", $newInt, $string, 1) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.7
'222 55555 2 hello byebye 444'

preferences:
90.75 ms | 1253 KiB | 4 Q