PHP数据类型判断函数总结

PHP数据类型判断函数总结

//判断数组 
$colors = array("red", "blue", "green"); 
if(is_array($colors)) 
{ 
print("colors is an array"."
"); 
} 
//双精度数判断 
$Temperature = 15.23; 
if(is_double($Temperature)) 
{ 
print("Temperature is a double"."
"); 
} 
//整数判断 
$PageCount = 2234; 
if(is_integer($PageCount)) 
{ 
print("$PageCount is an integer"."
"); 
} 
//对象判断 
class widget 
{ 
var $name; 
var $length; 
} 
$thing = new widget; 
if(is_object($thing)) 
{ 
print("thing is an object"."
"); 
} 
//字符判断 
$Greeting = "Hello"; 
if(is_string($Greeting)) 
{ 
print("Greeting is a string"."
"); 
} 
?>