How to use php is_array()

In PHP, the is_array() function can be used to detect whether a variable is an array, the syntax is "is_array($var)"; the return value of this function is of bool type, if the detected parameter var is an array , it returns true, otherwise it returns false.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php is_array() function

PHP is_array() function is used to determine whether a variable is an array. Its syntax is as follows:

bool is_array ( mixed $var )

Parameter description:

• $var : The variable to be tested.

Return value

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

The usage example of this function is as follows:

<?php
header("Content-type:text/html;charset=utf-8"); 
$arr_site = array(&#39;天蓬/猪老师&#39;, &#39;灭绝师妹&#39;, &#39;欧阳克&#39;, &#39;西门大官人&#39;);
if(is_array($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:

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