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run code in 300+ PHP versions simultaneously
<?php $str = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z, ,"; print_r(preg_split('~[^[:alnum:],]*,[^[:alnum:]]*|[\s,]+~', $str, -1, PREG_SPLIT_NO_EMPTY));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => A [1] => B [2] => C [3] => D [4] => E [5] => F [6] => G [7] => H [8] => I [9] => J [10] => K [11] => L [12] => M [13] => N [14] => O [15] => P [16] => Q [17] => R [18] => S [19] => T [20] => U [21] => V [22] => W [23] => X [24] => Y [25] => Z )

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