PHP judgment Variable Type implementation Code _php Foundation

PHP includes several functions to determine the type of variable, such as: GetType (), Is_array (), Is_float (), Is_int (), Is_object (), and is_string ().

Copy Code code as follows:

<?php
$s = "This is a string";
$i = 9;
$arr = Array (2,4,6);
Is_string ($s); Returns true to indicate that $s is a string variable
Is_string ($i); Returns false to indicate that $i is not a string variable
Is_array ($arr); Returns true to indicate that $arr is an array
Is_array ($s); Returns false to indicate that $s is not an array
$str = "This is a string";
$int = 9;
$bool = FALSE;
The type of echo "\ $str is:". GetType ($STR);
echo "<br/>";
echo "<br/>";
The type of echo "\ $int is:". GetType ($int);
echo "<br/>";
echo "<br/>";
The type of echo "\ $bool is:". GetType ($bool);
?>