変数の型を返すgettype()関数

使い方はgettype(変数)とする。

108
108.1
108
1

integer
double
string
boolean
NULL

source

<?php
$var1 = 108;
$var2 = 108.1;
$var3 = "108";
$var4 = true;
$var5 = null;
echo $var1,"<br>";
echo $var2,"<br>";
echo $var3,"<br>";
echo $var4,"<br>";
echo $var5,"<br>";
echo gettype($var1),"<br>";
echo gettype($var2),"<br>";
echo gettype($var3),"<br>";
echo gettype($var4),"<br>";
echo gettype($var5),"<br>";
?>