PHP filter_has_var() Function
Definition and Usage
The filter_has_var() function checks if a variable of the specified input type exists.
Returns true on success, otherwise returns false.
Syntax
filter_has_var(type, variable)
| Parameter | Description |
|---|---|
| type |
Required. Specifies the type to be checked. Possible values:
|
| variable | Required. Specifies the variable to be checked. |
Example
In this example, the input variable "name" is sent to the PHP page:
<?php
if(!filter_has_var(INPUT_GET, "name"))
{
echo("Input type does not exist");
}
else
{
echo("Input type exists");
}
?>
Output similar to:
Input type exists
