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<?php $strings = [ 'Vanilla', 'Curaçao', 'Vanilla Ice', "Vanilla\nIce", 'वैनिला', 'فانيليا', 'དྲི་ཞིམ་ལྡན་པའི་རྩྭ།', '12345!?', "\t", " ", ]; function is_utf8_printable($string): bool { return (bool) preg_match('~^[[:print:]]+$~u', $string); } $printable = array_map(function($string) { // $is = ctype_print($string); $is = is_utf8_printable($string); return [$string => $is]; }, $strings); var_dump($printable);
Output for 7.3.13 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.4, 8.3.6 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(10) { [0]=> array(1) { ["Vanilla"]=> bool(true) } [1]=> array(1) { ["Curaçao"]=> bool(true) } [2]=> array(1) { ["Vanilla Ice"]=> bool(true) } [3]=> array(1) { ["Vanilla Ice"]=> bool(false) } [4]=> array(1) { ["वैनिला"]=> bool(true) } [5]=> array(1) { ["فانيليا"]=> bool(true) } [6]=> array(1) { ["དྲི་ཞིམ་ལྡན་པའི་རྩྭ།"]=> bool(true) } [7]=> array(1) { ["12345!?"]=> bool(true) } [8]=> array(1) { [" "]=> bool(false) } [9]=> array(1) { [" "]=> bool(true) } }
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(10) { [0]=> array(1) { ["Vanilla"]=> bool(true) } [1]=> array(1) { ["Curaçao"]=> bool(true) } [2]=> array(1) { ["Vanilla Ice"]=> bool(true) } [3]=> array(1) { ["Vanilla Ice"]=> bool(false) } [4]=> array(1) { ["वैनिला"]=> bool(true) } [5]=> array(1) { ["فانيليا"]=> bool(true) } [6]=> array(1) { ["དྲི་ཞིམ་ལྡན་པའི་རྩྭ།"]=> bool(true) } [7]=> array(1) { ["12345!?"]=> bool(true) } [8]=> array(1) { [" "]=> bool(false) } [9]=> array(1) { [" "]=> bool(true) } }

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