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This article mainly introduces the relevant knowledge of "how to force type conversion to str string by php". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to force type conversion to str string in php" can help you solve the problem.

Forced type conversion method: 1, the use of strval () function, syntax "strval (variable)"; 2, the use of settype () function, syntax "settype (data value,"string") "; 3, in the conversion type of variables before adding" (string) ", syntax" (string) variable ".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php has three ways to cast a variable to string (string):

Use the conversion function strval ()

Use the conversion function settype ()

Add the target type enclosed in parentheses (string) before the variable to be converted

Method 1: use the conversion function strval ()

The strval () function is used to get the string value of a variable and is often used to convert integer, floating-point, and other data to string types.

Syntax: strval ($var)

The strval () function cannot be used for array or object conversion.

Example:

Method 2: use the conversion function settype ()

The settype ($var,$type) function sets the variable $var to the specified data type $type. ($type can be boolean (bool), integer (int), float (double), string, array, object, null).

You only need to set the parameter $type to "string" to convert the specified variable to a string type.

Note: the settype () function modifies the original property; it returns TRUE if the setting type is successful and FALSE if it fails.

Example:

Method 3: add the target type enclosed in parentheses (string) before the variable to be converted

That's all for "how php casts types to str strings". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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