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<?php $a = 42; var_dump( filter_var( $a, FILTER_VALIDATE_STRING ) ); var_dump( filter_var( $a, FILTER_SANITIZE_STRING ) );
Output for 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
Fatal error: Uncaught Error: Undefined constant "FILTER_VALIDATE_STRING" in /in/isYXc:4 Stack trace: #0 {main} thrown in /in/isYXc on line 4
Process exited with code 255.
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 Fatal error: Uncaught Error: Undefined constant "FILTER_VALIDATE_STRING" in /in/isYXc:4 Stack trace: #0 {main} thrown in /in/isYXc on line 4
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant FILTER_VALIDATE_STRING - assumed 'FILTER_VALIDATE_STRING' (this will throw an Error in a future version of PHP) in /in/isYXc on line 4 Warning: filter_var() expects parameter 2 to be int, string given in /in/isYXc on line 4 NULL string(2) "42"
Output for 7.2.0 - 7.2.33
Warning: Use of undefined constant FILTER_VALIDATE_STRING - assumed 'FILTER_VALIDATE_STRING' (this will throw an Error in a future version of PHP) in /in/isYXc on line 4 Warning: filter_var() expects parameter 2 to be integer, string given in /in/isYXc on line 4 NULL string(2) "42"
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant FILTER_VALIDATE_STRING - assumed 'FILTER_VALIDATE_STRING' in /in/isYXc on line 4 Warning: filter_var() expects parameter 2 to be integer, string given in /in/isYXc on line 4 NULL string(2) "42"
Output for 5.6.0 - 5.6.40
Notice: Use of undefined constant FILTER_VALIDATE_STRING - assumed 'FILTER_VALIDATE_STRING' in /in/isYXc on line 4 Warning: filter_var() expects parameter 2 to be long, string given in /in/isYXc on line 4 NULL string(2) "42"

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