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<?php $a = range(4,17); print_r( array_filter($a, function($x){ return strpos( (string)$x, '5' ) === false; }) ); // $x = 5; // echo strpos((string)$x, '5') !== false;
Output for 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 - 8.3.4, 8.3.6
Array ( [0] => 4 [2] => 6 [3] => 7 [4] => 8 [5] => 9 [6] => 10 [7] => 11 [8] => 12 [9] => 13 [10] => 14 [12] => 16 [13] => 17 )
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] => 4 [2] => 6 [3] => 7 [4] => 8 [5] => 9 [6] => 10 [7] => 11 [8] => 12 [9] => 13 [10] => 14 [12] => 16 [13] => 17 )

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