PHP is_callable() Function
❮ PHP Variable Handling Reference
Example
Check whether the contents of a variable can be called as a function or not:
<?php
function test1(){
}
echo "test1 is callable: " . is_callable("test1");
echo "<br>";
echo "test2 is callable: " . is_callable("test2");
?>
Try it Yourself »
Definition and Usage
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.
Syntax
is_callable(variable, syntax_only, name );
Parameter Values
| 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) |
Technical Details
| Return Value: | TRUE if variable is callable, FALSE otherwise |
|---|---|
| Return Type: | Boolean |
| PHP Version: | 4.0.6+ |
❮ PHP Variable Handling Reference
