w3resource

PHP: settype() function

Description

The settype() function is used to set the type of a variable.

Version:

(PHP 4 and above)

Syntax:

settype(var_name, var_type)

Parameters:

Name Description Required /
Optional
Type
var_name The variable being converted. Required Mixed*
var_type Type of the variable. Possible values are : boolean, integer, float, string, array, object, null. Optional String

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

TRUE on success or FALSE on failure.

Value Type: Boolean.

Example:

<?php
$var1='98';
$var2='01';
settype($var1, "integer");
settype($var2, "integer");
echo ($var1.'<br>');
echo ($var2.'<br>');
echo ($var1+$var2.'<br>');
?>

Output:

98
1
99

View the example in the browser

Practice here online :

See also

PHP Function Reference

Previous: serialize
Next: strval



PHP: Tips of the Day

SQL injection that gets around mysql_real_escape_string()

Consider the following query:

$iId = mysql_real_escape_string("1 OR 1=1");    
$sSql = "SELECT * FROM table WHERE id = $iId";

mysql_real_escape_string() will not protect you against this. The fact that you use single quotes (' ') around your variables inside your query is what protects you against this. The following is also an option:

$iId = (int)"1 OR 1=1";
$sSql = "SELECT * FROM table WHERE id = $iId";

Ref : https://bit.ly/32q3bJ7