PHP array_walk_recursive() Function Usage and Example

PHP Array Function Manual

The array_walk_recursive() function applies the user function recursively to each member of the array

Syntax

array_walk_recursive(　$array,　$funcname,$parameter])

Definition and Usage

The array_walk_recursive() function runs the user-defined function for each array element. The keys and values are parameters in the function.

Apply the user-defined function funcname to each element of the array. This function will recurse into deeper arrays.

Return Value

　Returns TRUE on success, or FALSE on failure.

Parameter

Online Example

<?php
　　　function call_back_function($value,$key) {
　　　　　　echo "Key $key has the value $value \n";
　　　}
　　　
　　　$input1　= array("a"=>"green",　"b"=>"brown",　"c"=>"blue"　);
　　　$input2　= array($input1,　"d"=>"yellow",　"e"=>"black");
　　　
　　　array_walk_recursive($input2,"call_back_function");
?>

Output result:

The value of key 'a' is 'green'　
The value of key 'b' is 'brown'　
The value of key 'c' is 'blue'　
The value of key 'd' is 'yellow'　
The value of key 'e' is 'black'

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