HTML meta tags are used to provide structured metadata about an HTML document. Mostly, 3 meta elements are used to specify the metadata for the web page, title, description, and keywords. The information from the meta tags can be fetched using PHP.

The preg_match() function is the best option to extract text between HTML tags with REGEX in PHP. If you want to get content between tags, use regular expressions with preg_match() function in PHP. You can also extract the content inside element based on class name or ID using PHP.

Password strength validation is very useful to check whether the password is strong. Strong password makes the user’s account secure and helps to prevent account hack. Using Regex (Regular Expression), you can easily validate the password strength in PHP. Use preg_match() function with Regular Expression to validate password strength in PHP.

Saving image from URL is very useful when you want to copy an image dynamically from the remote server and store in the local server. The file_get_contents() and file_put_contents() provides an easiest way to save remote image to local server using PHP. The image file can be saved straight to directory from the URL. You can also use cURL to save an image from URL using PHP.

The file_exists() function in PHP, is used to check if a file or directory exists on the server. But the file_exists() function will not usable if you want to check the file existence on the remote server. The fopen() function is the easiest solution to check if a file URL exists on a remote server using PHP. You can also use cURL to check if a URL exists on the remote server.

Stripping query parameter is very useful when you want to create a URL dynamically based on some conditions. The preg_replace() function is the easiest way to remove a specific parameter and its value from URL query string using PHP. PHP preg_replace() function searches string for matches to pattern and replace with the replacement. Use preg_replace() with REGEX to remove parameter from query string using PHP.

The Regular Expressions are the easiest option to change the characters format based on the specific pattern. You can change the word format in a string using PHP with Regex. If you want to separate bunched words in a string, put a space in front of each word. Use the preg_replace() with Regex to insert space in front of uppercase character in a string using PHP.

Before taking any action with date input, it always a great idea to validate the date string. Date validation helps to check whether the provided string is a valid date format. Using the DateTime class you can easily check if the date string is valid in PHP. It is very useful for server-side validation of the date input using PHP.

In the web application, generally, the file is downloaded from the same server. But sometimes the file needs to be downloaded from the remote server. But sometimes the file needs to be downloaded from the remote server. Use the readfile() function with application/x-file-to-save Content-type header, to download a ZIP file from remote URL using PHP.