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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 7.3.16 - 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 ) Warning: preg_split(): Compilation failed: quantifier does not follow a repeatable item at offset 2 in /in/SsWgZ on line 10 Array ( [1] => one! [2] => two: three; [3] => "four" )
Output for 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, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33
Array ( [0] => one [1] => two [2] => three [3] => four ) Warning: preg_split(): Compilation failed: nothing to repeat at offset 2 in /in/SsWgZ on line 10 Array ( [1] => one! [2] => two: three; [3] => "four" )
Output for 4.3.0 - 4.3.10
Array ( [0] => one [1] => two [2] => three [3] => four ) Warning: Compilation failed: nothing to repeat at offset 2 in /in/SsWgZ on line 10 Array ( [1] => one! [2] => two: three; [3] => "four" )

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