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<?php function isIndexedArray($array) { return !(bool)count(array_filter(array_keys($array), 'is_string')); } assert(isIndexedArray(['a' => ''])); assert(isIndexedArray(['a']));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught AssertionError: assert(isIndexedArray(['a' => ''])) in /in/HM5tr:7 Stack trace: #0 /in/HM5tr(7): assert(false, 'assert(isIndexe...') #1 {main} thrown in /in/HM5tr on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: assert(): assert(isIndexedArray(['a' => ''])) failed in /in/HM5tr on line 7
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Warning: assert(): Assertion failed in /in/HM5tr on line 7

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