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<?php class WP_Error extends stdClass {} $empty_array = array(); $array = array( 'cat1', 'cat2', 'cat3', 'cat1' ); $error = new WP_Error(); var_dump(array_unique($empty_array)); var_dump(array_unique($array)); var_dump(array_unique($error)); // This is the problem case.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.14, 8.4.16 - 8.4.17, 8.5.0 - 8.5.2
array(0) { } array(3) { [0]=> string(4) "cat1" [1]=> string(4) "cat2" [2]=> string(4) "cat3" } Fatal error: Uncaught TypeError: array_unique(): Argument #1 ($array) must be of type array, WP_Error given in /in/vUnPH:11 Stack trace: #0 /in/vUnPH(11): array_unique(Object(WP_Error)) #1 {main} thrown in /in/vUnPH on line 11
Process exited with code 255.
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(0) { } array(3) { [0]=> string(4) "cat1" [1]=> string(4) "cat2" [2]=> string(4) "cat3" } Warning: array_unique() expects parameter 1 to be array, object given in /in/vUnPH on line 11 NULL
Output for 4.4.5 - 4.4.9, 5.2.1 - 5.2.17
array(0) { } array(3) { [0]=> string(4) "cat1" [1]=> string(4) "cat2" [2]=> string(4) "cat3" } array(0) { }
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0
array(0) { } array(3) { [0]=> string(4) "cat1" [1]=> string(4) "cat2" [2]=> string(4) "cat3" } object(WP_Error)#1 (0) { }
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/vUnPH on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.4
array(0) { } array(3) { [0]=> string(4) "cat1" [1]=> string(4) "cat2" [2]=> string(4) "cat3" } object(wp_error)(0) { }

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