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<?php preg_replace('/ab/', ['x', 'y'], 'ab');
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: preg_replace(): Argument #1 ($pattern) must be of type array when argument #2 ($replacement) is an array, string given in /in/O8O7T:3 Stack trace: #0 /in/O8O7T(3): preg_replace('/ab/', Array, 'ab') #1 {main} thrown in /in/O8O7T on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: preg_replace(): Parameter mismatch, pattern is a string while replacement is an array in /in/O8O7T on line 3

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