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run code in 500+ PHP versions simultaneously
<?php $txt = "　First is ideographic space"; //$txt = preg_replace("/^　+/m", '', $txt); echo preg_replace("/^[^\S\r\n]+/m", '', $txt);
Output for 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 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
　First is ideographic space
preferences:
31.21 ms | 1152 KiB | 7 Q