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<?php $str = " one! two:\tthree; \"four\" "; print_r(str_word_count($str, 1)); print_r(preg_split("/\B/",trim($str))); print_r(array_filter(explode(' ', implode(' ', array_map('trim', explode("\n", $str))))));
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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 ( [0] => one [1] => two [2] => three [3] => four ) Array ( [0] => o [1] => n [2] => e! [3] => [4] => [5] => [6] => [7] => t [8] => w [9] => o: [10] => t [11] => h [12] => r [13] => e [14] => e; [15] => [16] => [17] => [18] => [19] => [20] => "f [21] => o [22] => u [23] => r" [24] => ) Array ( [1] => one! [2] => two: three; [3] => "four" )

preferences:
288.8 ms | 406 KiB | 459 Q