How to remove space elements in an array in php

Two methods: 1. Traverse the array and delete space elements. The syntax "foreach($arr as $k=>$v){if($v == " "){unset($arr[ $k]);}}". 2. Call the callback function through array_filter() to process the array elements and filter out the space elements.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

php remove the array Two methods for space elements

Method 1: Traverse the array and delete space elements

<?php
$arr = [11," ",33," ",44," ",66];
var_dump($arr);
foreach($arr as $k=>$v){
	if($v==" "){
		unset($arr[$k]);
	}
}
var_dump($arr);
?>

Method 2: Use array_filter() to filter space elements

The array_filter() function uses a callback function to filter elements in the array.

This function passes each key value in the input array to the callback function. If the callback function returns true, the current key value in the input array is returned to the result array. Array key names remain unchanged.

Example:

<?php
function f($var){
    return($var !=" ");
}
$arr = [11," ",33,44," ",66];
var_dump($arr);
$NewArr=array_filter($arr,"f");
var_dump($NewArr);
?>

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