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PHP numeric judgment Function

Source: Internet
Author: User
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PHP code for judging several commonly used numbers, including double precision, integers, and characters.

<HTML> <HEAD> <TITLE> common numeric judgment functions </TITLE> </HEAD> <BODY> <? // Determine the array $ colors = array ("red", "blue", "green"); if (is_array ($ colors) {print ("colors is an array ". "<br>") ;}// double-precision value determination $ Temperature = 15.23; if (is_double ($ Temperature) {print ("Temperature is a double ". "<br>") ;}// integer judge $ PageCount = 2234; if (is_integer ($ PageCount) {print ("$ PageCount is an integer ". "<br>") ;}// object judgment class widget {var $ name; var $ length;} $ thing = new widget; if (is_object ($ thin G) {print ("thing is an object ". "<br>") ;}// judge the string $ Greeting = "Hello"; if (is_string ($ Greeting) {print ("Greeting is a string ". "<br>") ;}?> </BODY> </HTML>
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