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並前往https://www.codeproject.com/Questions/1174157/How-to-check-if-a-value-exists-in-any-key-in-PHP-a

How to check if a value exists in any key in PHP array

Try this: <?php $array = array(array("a", "def", "c"),array("x", "y", "z"),array("x", "y", "def")); $keys = []; for ($i=0; $i<count($array); ...

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