PHP newline character PHP_EOL
In PHP, line breaks can be replaced with PHP_EOL to improve source-level portability of the code: Unix systems use \n Windows systems use \r\n Mac uses \r <?php ech...
PHP 7 New Features
Scalar type declarations The parameter type declarations for functions in PHP 7 can now be scalar. In PHP 5, only class names, interfaces, arrays, or callable (PHP 5.4, i.e., functions, including...
PHP receives and compresses images (paths stored in database)
Three files are used connect.php: for connecting to the database test_upload.php: for executing SQL statements upload_img.php: for uploading and compressing images The code for the three files is as follows: co...
PHP MySQL Pagination Example
The following example demonstrates how PHP queries data through a MySQL database and implements pagination: <?php $num_rec_per_page=10; // Number of records displayed per page mysql_connect('lo...
PHP receives JSON and inserts the received data into the database
Recently there was a requirement: the frontend submits JSON to the backend, the backend parses it and inserts the submitted values into the database. Difficulties: 1. PHP parsing JSON (this isn't really a difficulty, there are plenty of examples online...)
PHP date format validation
The following uses PHP regular expressions to match the date format "YYYY-MM-DD": function checkDateFormat($date) { //matchdayperiodFormatting if (preg_match ...
PHP Generate CSV File
<?php $csv = ""; foreach ($data as $row) { $csv .= join(",", $row) . "n"; } echo $csv; ?> <?php function ...
PHP simple pagination code
total_page = 10; $current_page = empty($_GET['page']) ? 1 : $_GET['page']; $previous_page = $current_page - 1; $next_page...
PHP Compress CSS Code
Place the following code in the style.css.php file, and don't forget to include the CSS files you need: <?php header('Content-type: text/css'); ob_start("comp...
PHP Recursively Delete Files in a Directory
<?php // $dir：wantDeleteofFileofDirectory function recursiveDelete($dir) { // 打...