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HTTP headers carry data between web servers and browsers for communication. Whenever we enter a URL in the address bar of our browser, it sends an HTTP request to the server; it contains a header. In PHP use get_headers() get the headers fo...

This tutorial will discuss different ways to check for numeric characters in PHP. We will use regular expressions and built-in functions in PHP. The functions we will use are ctype_digit , preg_match , , strpos , is_numeric and filter_var ....

This article will cover different ways to format numbers as dollar amounts in PHP with examples. These include: number_format NumberFormatter::formatCurrency Regular expressions Manual format We'll also look at why money_format the function...

$_SERVER['HTTP_REFERER'] Provides us with a referrer URL to determine the user request on the server. However, this is not a best practice because the referrer can be HTTP compromised through . $_SESSION[] Determine the referrer in PHP usin...

curl This article will show you how to use Requests in PHP to set PHP_AUTH_USER and PHP_AUTH_PW and use Requests through the command line curl . It will also show you how to confirm that the values ​​of PHP_AUTH_USER and PHP_AUTH_PW hav...

Multithreading is a form of program execution in which a single process creates multiple threads and they execute simultaneously. This tutorial will discuss multithreading in PHP and show you how to implement it. Parallel Implementing multi...

phpinfo() is a built-in function in PHP which outputs all the information of PHP configuration on the local host. We have to phpinfo() create a PHP file with a simple function call. Sometimes, the file may not work properly and output a 404...

This article shows the steps to update the PHP version from 7.x version to 7.4 in CentOS. How to Update PHP from 7.X to 7.4 in CentOS Update operating system packages. yum update -y Check your PHP version in CentOS. php -v Prints a list of...

PHP has one of the best encryption functions for data security. Hash_hmac() The encrypt function is one of the most famous encryptors. We'll show you how to use hash_hmac and sha256 encryptors to create 安全签名 one that you can store i...

We can upload images in PHP using simple file upload operation, but first, php.ini file upload should be enabled from Files. This tutorial demonstrates how to upload images in PHP. php.ini Enable file upload from file in PHP to upload image...

In this tutorial article, we will discuss about resizing images in PHP. Load the image before resizing Before we can resize an image, we must first load it as an image resource in our script. This is file_get_contents() different from using...

Different tasks may require running multiple versions of PHP. You may need to switch PHP versions by running two sites on the same server or testing older versions of code using outdated methods. We can switch PHP versions on Ubuntu using t...

Let's say you're in a login form and you enter the wrong information; in this case, you probably want to go back to the login page. PHP has a built-in function header() to redirect a page to a specific page. But what if the login page is at...

This article shows you how to div id store a in a PHP variable and pass it to JavaScript code. We will answer the following questions. What is div id ? How to div id store in a PHP variable? How to pass variables to JavaScript code? Let’s...

We will use PHP and ajax by printing a simple sum of two numbers 2 and . Also, print a php array in JSON. 3 object We will also use PHP with ajax by getting the HTML formatted output from the number division in PHP. Printing simple addition...