How to add one to all elements in an array in PHP

Implementation method: 1. Customize a function "myf($num)" that adds one to the parameter; 2. Use the array_map() function to apply the custom function "myf() once to each element of the array. ", pass the array elements to the function for increment processing, the syntax is "array_map("myf",$arr)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In In PHP, you can use the array_map() function to add one to all the elements in an array.

array_map() function applies the user-defined function to each value in the array, and returns the array with the new value after the user-defined function is applied.

Syntax:

array_map(myfunction,array)

• myfunction: required. The name of the user-defined function, or null.

Implementation code:

<?php
function myf($num)
{
   return($num+1);
}
 
$arr=array(1,2,3,4,5);
var_dump(array_map("myf",$arr));
?>

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