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<?php $subusers = [" hey", " wh at", " ", "wh@t"]; foreach ($subusers as $subuser) { echo "Assess \"$subuser\":\t"; if (!strlen($subuser = trim($subuser))) { echo "* Username not entered"; //} elseif (!preg_match('/^[\da-z]+$/i', $subuser)) { } elseif (!ctype_alnum($subuser)) { echo "* Username not alphanumeric"; } echo "\n"; }
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
Assess " hey": Assess " wh at": * Username not alphanumeric Assess " ": * Username not entered Assess "wh@t": * Username not alphanumeric
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 Assess " hey": Assess " wh at": * Username not alphanumeric Assess " ": * Username not entered Assess "wh@t": * Username not alphanumeric
preferences:
251.85 ms | 402 KiB | 287 Q