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<?php $arr = Array ( 0 => 'world', 1 => 'is', 2 => 'a', 3 => 'wonderfull', 5 => 'in', 6 => 'our' ); $new_array = []; $old_key = -1; $i = 0; foreach($arr as $key=>$val){ if(($key-$old_key) ==1){ $new_array[$i][] = $val; $old_key = $key; } if(($key-$old_key) >1){ $i++; $new_array[$i][] = $val; $old_key = $key; } } print_r($new_array);
Output for 5.6.38, 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
Array ( [0] => Array ( [0] => world [1] => is [2] => a [3] => wonderfull ) [1] => Array ( [0] => in [1] => our ) )
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 ( [0] => Array ( [0] => world [1] => is [2] => a [3] => wonderfull ) [1] => Array ( [0] => in [1] => our ) )

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130.97 ms | 402 KiB | 211 Q