{"id":13951,"date":"2024-03-15T08:11:12","date_gmt":"2024-03-15T08:11:12","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-php-array_keys\/"},"modified":"2025-08-06T01:31:36","modified_gmt":"2025-08-06T01:31:36","slug":"what-is-the-usage-of-php-array_keys","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-php-array_keys\/","title":{"rendered":"PHP array_keys() Function Usage"},"content":{"rendered":"

The function array_keys() is used to return all the keys of an array.<\/p>\n

Syntax:
\narray_keys(array, value, strict)<\/p>\n

Parameters:
\narray: Required. Specifies the array from which to return the key names.
\nvalue: Optional. Specifies a certain value within the array.
\nstrict: Optional. If this parameter is set to true, a strict type comparison will be performed.<\/p>\n

Return value:
\nThis function returns a new array containing all the keys in the array.<\/p>\n

“Can you please turn down the volume?”
\n“Could you lower the volume, please?”<\/p>\n

$arr = array(\"a\" => \"apple\", \"b\" => \"banana\", \"c\" => \"cherry\");\r\n$keys = array_keys($arr);\r\nprint_r($keys);\r\n<\/code><\/pre>\n
Output:<\/p>\n
Array\r\n(\r\n    [0] => a\r\n    [1] => b\r\n    [2] => c\r\n)\r\n<\/code><\/pre>\n
In this example, the keys of the $arr array are “a”, “b”, and “c”, so the array_keys() function is used to return a new array containing these keys.<\/p>\n","protected":false},"excerpt":{"rendered":"
The function array_keys() is used to return all the keys of an array. Syntax: array_keys(array, value, strict) Parameters: array: Required. Specifies the array from which to return the key names. value: Optional. Specifies a certain value within the array. strict: Optional. If this parameter is set to true, a strict type comparison will be performed. 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