How to determine if a variable is an array in php

The way PHP determines whether a variable is an array is through the is_array() function. Function syntax: [bool is_array(mixed $var)], if the detected variable is an array, it returns TRUE, otherwise it returns FALSE.

# To determine whether a variable is an array, you can use the is_array() function.

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Function introduction:

is_array() function is used to detect whether a variable is an array.

PHP version requirements: PHP 4, PHP 5, PHP 7

Function syntax:

bool is_array ( mixed $var )

Parameter description:

• $ var: Variable to be detected

Return value

If the variable to be detected is an array, TRUE is returned, otherwise FALSE is returned.

Code implementation:

<?php
$arr_site = array(&#39;Google&#39;, &#39;Runoob&#39;, &#39;Facebook&#39;);
if(is_array($arr_site)){
    echo &#39;变量 $arr_site 是一个数组&#39;;
} else {
    echo &#39;变量 $arr_site 不是一个数组&#39;;
}
?>

Output result:

变量 $arr_site 是一个数组

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