![\"PHP](\"https:\/\/img.php.cn\/upload\/article\/000\/000\/000\/172490838694590.jpg\")
<\/p>\n![\"PHP](\"https:\/\/img.php.cn\/upload\/article\/000\/000\/000\/172490838877618.jpg\")
<\/h4>\n![\"PHP](\"https:\/\/img.php.cn\/upload\/article\/000\/000\/000\/172490839033551.jpg\")
<\/p>\n
The php base64_decode is one of the function it is mainly used for to taking the base64 value that is hardly encoded string and also it is one of the Boolean type parameter values; moreover, it is not necessary, and it’s an optional parameter it will return the decoded datas if the strict parameter type is set the Boolean type of value has the argument and also return the values based upon the functional type arguments if the Boolean value is false has the return value and if the user input contains the values from outside of the base64 type values.
Start Your Free Software Development Course
Web development, programming languages, Software testing & others
Syntax
In PHP, base64_decode is one of the schemes that are moreover is needed for decrypting the datas from the encrypted binary datas that can be stored and transfer the file with some extension. The php has default methods, variables and keywords for performing the back end tasks.
<?php
function functionname($variablename)
{
----some php logic code based on the requirement---
return base64_decode($php variables, functions);
}
?>
The above codes are the basic codes for to decrypting or decoding the binary-coded values with the help of the base64_decode() method. The method will pass the uri variables with default functions.
How base64_decode Method works in PHP?
The php base64_decode function to decode the original datas by using these base64_decode function. The decoding datas are generally received the user input requests. The controller will handle the datas to convert the encoded input values and back to the original data contents by using this method. While the base64_decode method is used in the homomorphism concept, and it between the module wise using the some data type values. Using some Algorithmic technique like divide and conquer approach it will split the encoded values into multiple types, and it decodes the sub-values, and it concatenates them.
When we use uri for this php base64_decode function, it also removes the ‘/” backslash character from the URI or url method arguments, and it returns the characters. First, the encoded data, like any inputs format, are converted to text and encoding the datas will always be used for capturing the binary datas and is used for to transmit the binary datas with the other information datas and is designed to be handled only the textual datas the Boolean type of arguments will return the decoded data values and optionally the strict parameters are assigned the Boolean format values if the user input values are validated while passing the data type values as the method arguments. If the input set of characters contains the outside of the base64 alphabet characters, it can be validated automatically from the method values; if the characters are not valid means, it shows the errors.
Whenever the parameter strict has the Boolean set of values like true means and then the base64_decode() function, it will return the false set of input characters from the other characters apart from the base64 format values. Whenever we use the other script type of values like javascript etc., and to transform the values with more securely for the url type of parameters and its filenames, it depends on not required for both encoding and decoding values. Basically, the string type of values are encoded, and it will pass the key for to decrypt the values. Likewise, the scramble datas and other techniques for encrypting the data scripts to combine all type of datas in a single function. It has some decoding tools for both online and offline values with some default methods for encoding and decoding the values.
Examples of PHP base64_decode
Given below are the examples of PHP base64_decode:
Example #1
Code:
<!DOCTYPE html>
<html>
<body>
<?php
function encodemethod($input, $p1 = null) {
$input = str_replace(array('-','+', '/'), array('-', '*', '/', '-', '_'), base64_encode($input));
if (!$p1) {
$input = rtrim($input, '= -');
}
return $input;
}
function decodemethod($input) {
return base64_decode(str_replace(array('-', '*', '/', '-', '_'), array('-','+', '/'), $input));
}
$s1 = 'J1dlbGNvbWUgVG8gTXkgRG9tYWluIGVoamRmYmhqaGFzZGpkaHNoYWRrZGpka2hkaGJqanNoNjQ4Mzc5ODc0OHNiZG5ianNkOHl3ZWloamRzc2JubW5rbm1uYnZjbmJjeGInCgo=';
echo base64_decode($s1). "\n";
$s1 = 'J2hnZGtqaHNiYWNoaUFBQUtKSERCSEphc2pza2pkYndxdWRzaHNic2pzc25iY3VranNic2NkaXNranNoYmNzaWpzbkFCWENIS0pOU0JBS0pBTlhCQVNKS05TQkFTSEtCWElLSkFCS0pTTkFCSyc=';
echo base64_decode($s1). "\n";
?>
</body>
</html>
Output:
Example #2
Code:
<!DOCTYPE html> <html> <body> <?php $s3 = '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'; $s4='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'; $s5= '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'; echo base64_decode($s3); echo base64_decode($s4); echo base64_decode($s5); ?> </body> </html>
Output:
Example #3
Code:
<?php
$encodevalues ='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';
$rf = base64_decode($encodevalues, true);
if (strpos($rf, '%PDF') !== 0) {
throw new Exception('The pdf file is not ceratedkindly check once in your encoding datas');
}
file_put_contents('C:\xampp\htdocs\test\file.pdf', $rf);
?>
Output:
In the above examples, we used the base64_decode function in different ways. In the first example, we used normal functions like base64_encode and base64_decode methods for the user input strings. Due to that, we can handle the n number of strings while we pass the runtime and compile-time functions. We used these function like base64_decode is used and supported with all types of data types and values like string, integer, float, short, long, double, etc. these are some data types that have supported these methods. And also it can handle some advance functionalities of the web-based applications like image, animations with some effects; these are the advanced technique which is handled by the php default functions.
Based on the requirement, the default functions and the techniques are handled by the 64 bits methods; they will be hardcoded. We can handle these encryption and decryption technique with the help of some tools for both online and offline versions. We can handle some file formats like rar, tar and pdf etc., with the help of this method. In the final example, we can see the user input data, which is hardcoded and by using the base64_decode() method, we can decode it and stored them to a separate variable. After that, with the help of default file methods, we can store the datas in the pdf format.
Conclusion
In php is one of the web base scripting languages, and it’s a back end code. It has n number of methods among that base64_decode() is one of the finest methods for decrypting the datas in the application. The encoding and decoding technique is a must for web-based application security whenever the client and server interactions.
The above is the detailed content of PHP base64_decode. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to combine two php arrays unique values?
Jul 02, 2025 pm 05:18 PM
To merge two PHP arrays and keep unique values, there are two main methods. 1. For index arrays or only deduplication, use array_merge and array_unique combinations: first merge array_merge($array1,$array2) and then use array_unique() to deduplicate them to finally get a new array containing all unique values; 2. For associative arrays and want to retain key-value pairs in the first array, use the operator: $result=$array1 $array2, which will ensure that the keys in the first array will not be overwritten by the second array. These two methods are applicable to different scenarios, depending on whether the key name is retained or only the focus is on
How to use php exit function?
Jul 03, 2025 am 02:15 AM
exit() is a function in PHP that is used to terminate script execution immediately. Common uses include: 1. Terminate the script in advance when an exception is detected, such as the file does not exist or verification fails; 2. Output intermediate results during debugging and stop execution; 3. Call exit() after redirecting in conjunction with header() to prevent subsequent code execution; In addition, exit() can accept string parameters as output content or integers as status code, and its alias is die().
Applying Semantic Structure with article, section, and aside in HTML
Jul 05, 2025 am 02:03 AM
The rational use of semantic tags in HTML can improve page structure clarity, accessibility and SEO effects. 1. Used for independent content blocks, such as blog posts or comments, it must be self-contained; 2. Used for classification related content, usually including titles, and is suitable for different modules of the page; 3. Used for auxiliary information related to the main content but not core, such as sidebar recommendations or author profiles. In actual development, labels should be combined and other, avoid excessive nesting, keep the structure simple, and verify the rationality of the structure through developer tools.
The requested operation requires elevation Windows
Jul 04, 2025 am 02:58 AM
When you encounter the prompt "This operation requires escalation of permissions", it means that you need administrator permissions to continue. Solutions include: 1. Right-click the "Run as Administrator" program or set the shortcut to always run as an administrator; 2. Check whether the current account is an administrator account, if not, switch or request administrator assistance; 3. Use administrator permissions to open a command prompt or PowerShell to execute relevant commands; 4. Bypass the restrictions by obtaining file ownership or modifying the registry when necessary, but such operations need to be cautious and fully understand the risks. Confirm permission identity and try the above methods usually solve the problem.
How to create an array in php?
Jul 02, 2025 pm 05:01 PM
There are two ways to create an array in PHP: use the array() function or use brackets []. 1. Using the array() function is a traditional way, with good compatibility. Define index arrays such as $fruits=array("apple","banana","orange"), and associative arrays such as $user=array("name"=>"John","age"=>25); 2. Using [] is a simpler way to support since PHP5.4, such as $color
php raw post data php
Jul 02, 2025 pm 04:51 PM
The way to process raw POST data in PHP is to use $rawData=file_get_contents('php://input'), which is suitable for receiving JSON, XML, or other custom format data. 1.php://input is a read-only stream, which is only valid in POST requests; 2. Common problems include server configuration or middleware reading input streams, which makes it impossible to obtain data; 3. Application scenarios include receiving front-end fetch requests, third-party service callbacks, and building RESTfulAPIs; 4. The difference from $_POST is that $_POST automatically parses standard form data, while the original data is suitable for non-standard formats and allows manual parsing; 5. Ordinary HTM
How to handle File Uploads securely in PHP?
Jul 08, 2025 am 02:37 AM
To safely handle PHP file uploads, you need to verify the source and type, control the file name and path, set server restrictions, and process media files twice. 1. Verify the upload source to prevent CSRF through token and detect the real MIME type through finfo_file using whitelist control; 2. Rename the file to a random string and determine the extension to store it in a non-Web directory according to the detection type; 3. PHP configuration limits the upload size and temporary directory Nginx/Apache prohibits access to the upload directory; 4. The GD library resaves the pictures to clear potential malicious data.
How Do You Pass Variables by Value vs. by Reference in PHP?
Jul 08, 2025 am 02:42 AM
InPHP,variablesarepassedbyvaluebydefault,meaningfunctionsorassignmentsreceiveacopyofthedata,whilepassingbyreferenceallowsmodificationstoaffecttheoriginalvariable.1.Whenpassingbyvalue,changestothecopydonotimpacttheoriginal,asshownwhenassigning$b=$aorp
