How to remove array elements containing strings in php

Removal steps: 1. Use the foreach statement to loop through the array, with the syntax "foreach ($array as $key => $value){loop body statement block;}"; 2. In the loop body, use The is_string() function determines whether the array element "$value" is of string type. If so, use the unset() function to delete the element. The syntax is "if(is_string($value)){unset($array[$key]" );}".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

In PHP, array elements containing strings is a string type. If you want to remove array elements containing strings, just remove the string type elements in the array.

Steps to remove array elements containing strings:

Step 1. Use the foreach statement to loop through the array

foreach ($array as $key => $value){
    循环体语句块;
}

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

Step 2: In the loop body, determine whether the element $value is of string type and delete the element

• Use is_string() The function determines whether the array element $value is of string type

• Use the unset() function to delete the string element based on the key name $key

if(is_string($value)){
unset($arr[$key]);
}

Complete implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(11,"23df3",12,"df3",3,"sdde",5); 
var_dump($arr);
foreach ($arr as $key => $value){
	if(is_string($value)){
		unset($arr[$key]);
	}
}
var_dump($arr);
?>

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