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<?php $val = " 1 , 2,3 "; $delimiter = ","; var_dump(explode($delimiter, $val)); var_dump("/\s*$delimiter\s*/"); var_dump(preg_split("/\s*$delimiter\s*/", $val));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [0]=> string(3) " 1 " [1]=> string(2) " 2" [2]=> string(2) "3 " } string(9) "/\s*,\s*/" array(3) { [0]=> string(2) " 1" [1]=> string(1) "2" [2]=> string(2) "3 " }

preferences:
213.35 ms | 406 KiB | 313 Q