How to convert array to bool type in php

Three ways to convert an array into bool type in php: 1. Add the target type enclosed in parentheses before the array variable, the syntax is "(bool)$array variable name" or "(boolean)$ Array variable name". 2. Use the boolval() function, the syntax is "boolval($array variable name)". 3. Use the settype() function to set the array variable to bool type, with the syntax "settype($array variable name, "boolean")".

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

php Lieutenant General Array Three methods to convert to bool type:

Method 1. Add the target type "(bool)" or "(boolean) enclosed in parentheses before the array variable ”

• (bool), (boolean): Variables can be converted into Boolean types

Implementation example:

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(1,2,3);
var_dump($arr);
$bool=(bool)$arr;
var_dump($bool);

$arr=array();
var_dump($arr);
$bool=(bool)$arr;
var_dump($bool);
?>

Method 2: Use boolval() function

boolval function is used to obtain the Boolean value of a variable.

Implementation example:

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(1,2,3);
var_dump($arr);
$bool=boolval($arr);
var_dump($bool);
?>

Method 3: Use settype() function

##settype( $var,$type) function can set the specified variable to the specified $type type.

If you want to convert the array to bool type, just set $type to "boolean" or ""bool".

Note: The settype() function will change the original array. If set Returns TRUE when successful and FALSE when failed.

Implementation example:

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array();
var_dump($arr);
$a=settype($arr,"boolean");
var_dump($arr);
?>

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