PHP number, character, object judgment function_PHP tutorial

Judging numbers, characters, objects, arrays, etc. in PHP includes functions such as is_bool(), is_int(), is_integer(), is_float(), is_real(), is_object() and is_array(). I don’t know how much you know. Woolen cloth. ​

//Double precision number judgment

is_double
is_double -- alias of is_float()
Description
This function is an alias for is_float().

The code is as follows

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代码如下	复制代码
$Temperature = 15.23; if(is_double($Temperature)) { print("Temperature is a double"." "); }

$Temperature = 15.23;

if(is_double($Temperature)) { print("Temperature is a double"."

");

}

//Integer judgment

代码如下	复制代码
$PageCount = 2234; if(is_integer($PageCount)) { print("$PageCount is an integer"." "); }

is_integer -- alias for is_int() and is_long()

Description
This function is an alias for is_int().

The code is as follows	Copy code
$PageCount = 2234; if(is_integer($PageCount)) { print("$PageCount is an integer"." "); }

//Object judgment

代码如下	复制代码
class widget { var $name; var $length; } $thing = new widget; if(is_object($thing)) { print("thing is an object"." "); }

is_object -- Check whether the variable is an object
Description bool is_object (mixed var)

Returns TRUE if var is an object, FALSE otherwise.

The code is as follows

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class widget
{

var $name;

var $length;

}

代码如下	复制代码
$Greeting = "www.hzhuti.com "; if(is_string($Greeting)) { print("Greeting is a string"." "); }

$thing = new widget;

if(is_object($thing))
{ print("thing is an object"." ");
}

//Character judgment

代码如下	复制代码
$int = 1; if(is_numeric($int)) { print("这是个真正的数字，纯爷们"." "); }

is_string -- Check whether the variable is a string Description bool is_string (mixed var) Returns TRUE if var is a string, FALSE otherwise.

The code is as follows	Copy code
$Greeting = "www.hzhuti. com "; if(is_string($Greeting)) { print("Greeting is a string"." "); }

is_numeric -- Check whether the variable is a number or a numeric string Description bool is_numeric (mixed var) Returns TRUE if var is a number or numeric string, FALSE otherwise.

The code is as follows	Copy code
$int = 1; if(is_numeric($int)) { print("This is a real number, just a man"." "); }

Okay, this article just briefly talks about the object, number, and character judgment functions in PHP. The difficulty is relatively simple.

http://www.bkjia.com/PHPjc/445312.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445312.htmlTechArticleJudge numbers, characters, objects, arrays, etc. in PHP, including see is_bool(), is_int(), is_integer( ), is_float(), is_real(), is_object() and is_array(). I don’t know about you...