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PHP | is_string() Function

Last Updated : 27 Apr, 2020
The is_string() function is an inbuilt function in PHP which is used to check whether the given value is a string or not. Syntax: 
bool is_string( mixed $var )
Parameters: This function accepts one parameter as mentioned above and described below:
  • $var: It contains the value that need to check.
Return Value: It returns TRUE if the value of variable is of string type and FALSE otherwise. Program 1:
Output: 
String
Not String
Not String
String
Not String
String
Program 2:
Output: 
bool(false)
bool(true)
bool(false)
bool(true)
Reference: https://www.php.net/manual/en/function.is-string.php
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