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How to remove array elements from an array in php

青灯夜游

Jun 02, 2022 pm 07:28 PM

phpphp array

Removal method: 1. Use "foreach($arr as $k=>$v){//loop body}" to loop through the array; 2. In the loop body, use "if(is_array( $v)){unset($arr[$k]);}" Determine whether the array element "$v" is an array type, and if so, delete the element.

How to remove array elements from an array in php

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

php removes an array Method of array elements

Step 1. Use foreach to traverse the array

foreach ($arr as $k => $v){
    //循环体语句块;
}

Traverse the given $arr array, in each loop The value of the current array will be assigned to $v, and the key name will be assigned to $k.

Step 2. In the loop body, determine whether the array element $v is an array type. If so, delete the element

if(is_array($v)){
    unset($arr[$k]);
}

is_array() function is used to detect whether a variable is an array. Returns TRUE if the variable being examined is an array, otherwise FALSE.
$Array variable name [key name] Can access specific array elements
unset() function is used for destruction given variable.

Implementation code:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr=array(1,array(2,3),-5,21,array(4,array(2,3)));
var_dump($arr);
foreach($arr as $k=>$v){
if(is_array($v)){
	unset($arr[$k]);
}
}
var_dump($arr);
?>

How to remove array elements from an array in php

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