Filter The Special Characters
<?php
$String="asdf-32^3###3sa435r";
$String=preg_replace('/[^a-zA-Z0-9_ -]/s', '', $String);
echo $String;
/** output **/
asdf-3233sa435r
?>
Validate Integer: FILTER_VALIDATE_INT
<?php
$int = "123";
if(!filter_var($int, FILTER_VALIDATE_INT))
{
echo($int." Integer is not valid");
}
else
{
echo($int." Integer is valid");
}
?>
<!-- OUTPUT
123.1 Integer is not valid
123 Integer is valid
-->
Validate Integer With Range: FILTER_VALIDATE_INT
<?php
$var=201;
$int_options = array(
"options"=>array
(
"min_range"=>0,
"max_range"=>200
)
);
if(!filter_var($var, FILTER_VALIDATE_INT, $int_options))
{
echo($var." Integer is not valid");
}
else
{
echo($var." Integer is valid");
}
?>
<!-- OUTPUT
200 Integer is valid
201 Integer is not valid
-->
Validate Email: FILTER_VALIDATE_EMAIL
<?php
$email = "[email protected]";
if(!filter_var($email, FILTER_VALIDATE_EMAIL))
{
echo($email." Email is not valid");
}
else
{
echo($email." Email is valid");
}
?>
<!-- OUTPUT
mail@gmailcom Email is not valid
[email protected] Email is valid
-->
Validate Email With _GET Method: FILTER_VALIDATE_EMAIL
<?php
if(!filter_has_var(INPUT_GET, "email"))
{
echo("Input type does not exist");
}
else
{
if (!filter_input(INPUT_GET, "email", FILTER_VALIDATE_EMAIL))
{
echo "E-Mail is not valid";
}
else
{
echo "E-Mail is valid";
}
}
?>
Validate Integer With _POST Method: FILTER_VALIDATE_INT
<?php
$int = "123";
if(!filter_has_var(INPUT_POST, "integer"))
{
echo("Input type does not exist");
}
else{
if(!filter_input(INPUT_POST,'integer', FILTER_VALIDATE_INT))
{
echo($int." Integer is not valid");
}
else
{
echo($int." Integer is valid");
}
}
?>
<!-- OUTPUT
123.1 Integer is not valid
123 Integer is valid
-->
