复制代码 代码如下: <HTML> <HEAD> <TITLE>常用的数值判断函数</TITLE> </HEAD> <BODY> <? //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