3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = "Line <br> Line <br> Line <br> Line <br> Line <br> Line <br>"; $replace = array("1", "2", "3", "4"); $counter = 0; $text = preg_replace_callback('~<br\s*/?>~', function($m) use($replace, &$counter) { if ($counter === count($replace)) { $counter = 0; } return $replace[$counter++]; }, $text); echo $text;
Output for 7.3.0 - 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 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
Line 1 Line 2 Line 3 Line 4 Line 1 Line 2
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Line 1 Line 2 Line 3 Line 4 Line 1 Line 2
preferences:
129.45 ms | 407 KiB | 5 Q