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PHP Variable Handling Reference : Check whether the contents of a variable can be called as a function or not
The is_callable() function checks whether the contents of a variable can be called as a function or not.
This function returns true (1) if the variable is callable, otherwise it returns false/nothing.
Parameter | Description |
---|---|
variable | Required. Specifies the variable to check |
syntax_only | Optional. If set to TRUE, the function only verifies if variable is a function or method. It will reject variables that are not strings, or arrays without a valid structure to be used as a callback. Default is false |
name | Optional. Returns a "callable name" (only for classes) |
Return Value: | TRUE if variable is callable, FALSE otherwise |
---|---|
Return Type: | Boolean |
PHP Version: | 4.0.6+ |
❮ PHP Variable Handling Reference