PHP | base64_decode() Function

The base64_decode() is an inbuilt function in PHP which is used to Decodes data which is encoded in MIME base64.
Syntax:

string base64_decode( $data, $strict )

Parameters: This function accepts two parameter as mentioned above and described below: 

• $data: It is mandatory parameter which contains the encoded string.
• $strict: It is an optional parameter. If this parameter is set to TRUE then the base64_decode() function will return FALSE if the input contains character from outside the base64 alphabet. Invalid characters will be silently discarded.

Return value: This function returns the decoded string on success or returns False in case of failure.
Below programs illustrate the base64_decode() function in PHP:
Program 1:

php

<?php

// Program to illustrate base64_decode()
// function
$str = 'R2Vla3Nmb3JHZWVrcw==';

echo base64_decode($str);
?>

Output:

GeeksforGeeks

Program 2:

php

<?php

// Program to illustrate base64_decode()
// function
$str = 'R0ZHLCBBIGNvbXB1dGVyIFNjaWVuY2UgUG9ydGFsIEZvciBHZWVrcw';
echo base64_decode($str). "\n";

$str = 'MQ==';
echo base64_decode($str). "\n";
?>

Output:

GFG, A computer Science Portal For Geeks
1

Reference: http://php.net/manual/en/function.base64-decode.php