Example
Escape special characters in a string:
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// escape variables for security
$firstname = mysqli_real_escape_string($con, $_POST['firstname']);
$lastname = mysqli_real_escape_string($con, $_POST['lastname']);
$age =
mysqli_real_escape_string($con, $_POST['age']);
$sql="INSERT INTO Persons (FirstName,
LastName, Age)
VALUES ('$firstname', '$lastname', '$age')";
if (!mysqli_query($con,$sql))
{
die('Error: ' . mysqli_error($con));
}
echo "1 record
added";
mysqli_close($con);
?>
Definition and Usage
The mysqli_real_escape_string() function escapes special characters in a string for use in an SQL statement.
Syntax
mysqli_real_escape_string(connection,escapestring);
| Parameter | Description |
|---|---|
| connection | Required. Specifies the MySQL connection to use |
| escapestring | Required. The string to be escaped. Characters encoded are NUL (ASCII 0), \n, \r, \, ', ", and Control-Z. |
Technical Details
| Return Value: | Returns the escaped string |
|---|---|
| PHP Version: | 5+ |
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