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This article is about how PHP queries whether or not an array contains a specified value. Xiaobian thinks it is quite practical, so share it with everyone for reference. Let's follow Xiaobian and have a look.

Query methods: 1. Use the in_array() function, syntax "in_array(value,array)", return TRUE if it contains;2. Use the array_search() function, syntax "array_search(value,array)", return the corresponding key name if it contains.

Operating environment of this tutorial: Windows 7 system, PHP7.1 version, DELL G3 computer

php queries whether the specified array contains values

Method 1: Use the in_array() function

The in_array() function searches for the presence of the specified value in an array. Returns TRUE if a value is found in the array, FALSE otherwise.

Method 2: Use the array_search() function

The array_search() function searches an array for a key and returns the corresponding key name.

Returns the key name if the specified key is found in the array; otherwise returns FALSE. If a key is found more than once in the array, the key name matched by the first key found is returned.

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