PHP filter_has_var()Functions
Complete PHP Filter Reference Manual
Definition and Usage
The filter_has_var() function checks whether a variable of the specified input type exists.
Returns TRUE on success, or FALSE on failure.
Syntax
filter_has_var(type, variable)
| Parameter | Description |
|---|---|
| type | Required. Specifies the type to check. Possible input types:
|
| variable | Required. Specifies the variable to check. |
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");
}
?>
if(!filter_has_var(INPUT_GET, "name"))
{
echo("Input type does not exist");
}
else
{
echo("Input type exists");
}
?>
The output of the code is shown below:
Input type exists
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