PHP Tutorials

This file upload implementation can be used for instance application development, because of the better security restrictions, of course, you can also upload image file type to get a judge. Today, the next few sites to improve the file upload system,

Recently a lot of friends are asking me if I can put my that word trojan hidden into HTML or pictures, in fact, a word trojan inserted into the PHP file is already very hidden, if you want to put in HTML files or pictures, then read the test report

This article to introduce you to the use of PHP with Strtotime or mktime specified date data (this week, last week, this month, last month, this quarter) instance, I hope that the students will help you. Strtotime Definition and usage The strtotime (

There are a lot of PHP beginners to intercept characters will use SUBSTR () function or mb_substr () function to intercept, the first Chinese must be garbled, the second performance is not good, the following I summed up a few custom Chinese text

int Exif_imagetype (string $filename) 1 imagetype_gif 2 Imagetype_jpeg 3 Imagetype_png 4 imagetype_swf 5 Imagetype_ps Tutorial D 6 imagetype_bmp 7 Imagetype_tiff_ii (Intel byte order) 8 imagetype_tiff_mm (Motorola byte order) 9 IMAGETYPE_JPC Ten

Understand the files function first The contents of the $_files array are as follows: $_files[' myfile ' [' Name '] The original name of the client file.The MIME type of the $_files[' myfile ' [' type '] file requires the browser to provide support

The following provides three code generation, compatibility is quite good, you can also customize the height and width oh. function Imageresize ($srcfile, $tow, $toh, $tofile = "") { if ($tofile = = "") {$tofile = $srcfile;} $info = ""; $data

One of the simplest ways to export excel in PHP is to export a CSV file, but to do so, we can do it with the help of the Phpexcel plugin. Phpexcel is a very powerful PHP operation of the class Library of Excel, but for the simple data in PHP to

At one level, PHP explode and the split function is not the difference between the character with what to separate the group, but a closer look at explode and split there is a difference, let me introduce you. First look at the definition of two

The article introduces the use of the DSA algorithm based on OpenSSL to generate signature instances, the generation of signature method is very simple, we need to understand the middle of the principle is more complex, we come together to see

Use Imagecreate () to create a variable that represents a blank image, which requires an image-size parameter in pixels, in the format imagecreate (X_size, y_size). If you want to create an image with a size of 250x250, you can use the following

In PHP, cookies and sessions are usually used to register login and record user information, but there are a lot of differences between cookies and session two, let's take a look at them. Session Brief: HTTP (Hypertext Transfer Protocol) defines the

Searching for files is simple as long as the user enters the directory, we will automatically traverse the directory to find the associated file name, and let's take a look at it. PHP file Finder, enter a path to determine the directory will

PHP batch to the image watermark code we often encounter to a large number of images to increase the watermark, this will touch the volume increase image watermark function, we provide you with a PHP batch to increase the watermark function. PHP

In PHP to implement the image to increase the watermark we have to use a lot of functions, imagecreatefromjpeg,imagecreatefrompng,getimagesize and so on, these are the functions of the PHP GD library, So we have to open the GD library in php.ini to

In PHP in the header has a lot of role, here we introduce to you in the use of headers as a file to jump some considerations, I hope this article can give you friends to bring happiness. Several problems should be noticed in header

PHP go space has the correlation function trime, he can remove two spaces or directly use LTrim and RTrim function results with trim, if you want to delete all the spaces only use str_replace replaced. Usually over the space, is generally used trim,

Add watermark to the picture is a lot of web site will do things, the following code only supports the text watermark Oh, now only support English, if you want this program to support Chinese characters will $font=\ ' verdana.ttf\ '; Calling a

It's all right. With a PHP AES encryption class program for YII extensions if you do not use the YII framework, the Code Yii::app ()->params[\ ' encryptkey\ ') is replaced by your corresponding default key. AES encryption algorithm-algorithm

Equal scale generated thumbnail PHP program This program is very implementation, but just used to come in and so on to generate thumbnails oh, you have to upload files to the server, and then the function to operate, a friend need reference. PHP