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<?php $x = new ArrayIterator( array( 'foo' => 1, 'bar' => 2, ) ); $keys = array_keys( $x ); if ( ! empty( $keys ) && is_array( $keys ) ) { print "PASS"; } else { print "FAIL"; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, ArrayIterator given in /in/bdoq5:7 Stack trace: #0 /in/bdoq5(7): array_keys(Object(ArrayIterator)) #1 {main} thrown in /in/bdoq5 on line 7
Process exited with code 255.
Output for 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
Warning: array_keys() expects parameter 1 to be array, object given in /in/bdoq5 on line 7 FAIL

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