PHP Filter_has_var Function
What is filter_has_var() in PHP?
Explanation
filter_has_var() is a function, used to check, whether the variable of the given input method exists or not. This function returns true on success i.e, when the type exists and false on failure.
filter_has_var(type, variable)
In the above syntax, 'type' specifies the input type.
Possible input types are INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER.
'variable' specifies the variable to be checked.
<?php
if(filter_has_var(INPUT_GET, "name"))
{
echo("Get Method is not empty");
}
else
{
echo("Get Method is empty");
}
?>
Result :
Get Method is not empty
In the above example, the value of "name" is assigned using the url as follows,
test.php?name=hiox
Hence, the output is "Get Method is not empty".
Syntax:
filter_has_var(type, variable)
In the above syntax, 'type' specifies the input type.
Possible input types are INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER.
'variable' specifies the variable to be checked.
Example :
<?php
if(filter_has_var(INPUT_GET, "name"))
{
echo("Get Method is not empty");
}
else
{
echo("Get Method is empty");
}
?>
Result :
Get Method is not empty
In the above example, the value of "name" is assigned using the url as follows,
test.php?name=hiox
Hence, the output is "Get Method is not empty".
