PHP array_walk() Function
Last Updated : 17 Mar 2025
The array_walk( ) function is an inbuilt function of PHP. It is used to apply a user supplied function to every element of an array. This function was introduced in 4.0.
Syntax
Parameters
| Parameter | Description | Is compulsory |
|---|---|---|
| array | The input array. | compulsory |
| User function | The name of the userdefined function. | compulsory |
| User data | If it is supplied, it will be passed as the third parameter to the user function | Optional |
Return Values
The array_walk( ) function returns true on success or false on failure.
Example 1
Output:
The key a has the value youtube The key b has the value google The key c has the value whatsapp
Example 2
Output:
Javatpoint tutorial1 has php Javatpoint tutorial2 has java Javatpoint tutorial3 has python
Example 3
Output:
cricket and sachin have been paired together. hockey and sandeep have been paired together.
Example 4
Output:
The key a has the value aajtak. The key b has the value zee news. The key c has the value ndtv.
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