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<?php $str = "This is a string"; $words = explode(" ", $str); $spaces=array(); $others=array(); foreach($words as $word) { if($word==' ') { array_push($spaces,$word); } else { array_push($others,$word); } } var_export([ 'words' => $words, 'spaces' => $spaces, 'others' => $others ]);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.26, 8.4.1 - 8.4.13
array ( 'words' => array ( 0 => 'This', 1 => 'is', 2 => 'a', 3 => '', 4 => '', 5 => '', 6 => 'string', ), 'spaces' => array ( ), 'others' => array ( 0 => 'This', 1 => 'is', 2 => 'a', 3 => '', 4 => '', 5 => '', 6 => 'string', ), )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 'words' => array ( 0 => 'This', 1 => 'is', 2 => 'a', 3 => '', 4 => '', 5 => '', 6 => 'string', ), 'spaces' => array ( ), 'others' => array ( 0 => 'This', 1 => 'is', 2 => 'a', 3 => '', 4 => '', 5 => '', 6 => 'string', ), )

preferences:
154.27 ms | 409 KiB | 5 Q