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<?php // В фильтрах нужно быть строже $arr = ['попа', 'ручка']; var_dump( in_array('', array_keys($arr)), in_array('', array_keys($arr), true), '' == 0, 0 == 'test', 'test' == 0, (int) 'test' );
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) bool(false) bool(false) bool(false) bool(false) int(0)

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