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is_callableVerify that the contents of a variable can be called as a function Description
bool is_callable
( mixed
$var
[, bool $syntax_only = false
[, string &$callable_name
]] )Verify that the contents of a variable can be called as a function. This can check that a simple variable contains the name of a valid function, or that an array contains a properly encoded object and function name. Parameters
Return Values
Returns Examples
Example #1 is_callable example
<?php Example #2 is_callable and constructors As of PHP 5.3.0 is_callable reports constructors as not being callable. This affects PHP 5 style constructors (__construct) as well as PHP 4 style constructors (i.e. methods with the same name as the class). Formerly, both cases have been considered callable.
<?php The above example will output: bool(false) bool(false) See Also
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