PHP

My preliminary understanding is that strlen can only calculate English characters, while mb_strlen can calculate the length of Chinese and English characters. Next I will introduce the differences between strlen and mb_strlen in detail. my

To read a file in php, we need to use file_get_contents or fopen to open the file and then read it. The file_get_contents function is easier to read the file than fopen, to write a file, you must cooperate with the fopen function and

We introduced here that the ID card number must be a simple one that does not determine whether the ID card number is valid or exists. It only meets some standards. Let's look at the two instances below. We introduced here that the ID card number

The requirement is as follows: there is a log file of about 1 GB, with about more than 5 million lines. php is used to return the last few lines of content. If we use a common method, the log file will be stuck, later, I saw a webmaster write this

The following describes the related functions in php. We can use these functions to obtain the memory usage of php. I hope the example can help you. The following describes the related functions in php. We can use these functions to obtain the

Phpsoap extends the Simple Object Access Protocol, which is a protocol specification for data exchange. It is a lightweight, simple, XML-based protocol (a subset of standard General Markup Language, it is designed to exchange structured and

It is still relatively simple to automatically log on to a website by scanning the QR code. As long as you know the principles of each other, you can do so. Let's look at two examples, I believe you have read the two examples and you will surely

Binary lookup may be used in the development of advanced points. Of course, this is the case when you are looking for a job in a large company. Let's take a look at the implementation method of binary lookup in php, the details are as follows.

In php, set_include_path will cause require. The include usage is different. For this problem, let's look at a simple example, as shown below. In php, set_include_path will cause require. The include usage is different. For this problem, let's look

Modify the size limit of 2 MB for attachments uploaded to WordPress php + iis the default size modification method for attachments uploaded to php + iis. After WordPress is installed on the server, it is found that the attachment size is limited to 2

Php-based regular expression to determine whether the mailbox format is valid jump to [1] [full screen Preview] // Check email function isEmail ($ val) {$ patrn = '/^ ([a-zA-Z0-9] + [_ | \.]?) * [A-zA-Z0-9] + @ ([a-zA-Z0-9] + [_ | \. | \-]?) *

This program is only for php + mysql fans to learn and test. During the test, errors may occur. Please modify this program according to the error prompt. This program is the installation version and run the install directory first, then follow the

Image anti-leech protection is implemented by many websites to save machine resources. We can see that QQ, Baidu, and so on have all these images, next I will use a simple method to crack the image anti-leech. Image anti-leech protection is

Methods starting with two underscores in PHP, __construct () ,__ destruct () ,__ call () ,__ callStatic () ,__ get () ,__ set (), __isset () ,__ unset () ,__ sleep () ,__ wakeup (), etc., known as the magic method (Magicmethods), the method that

Cookie is a small text file stored locally by the user. We can access it through a browser. Let's take a look at some things about how PHP deletes cookies. Cookie is a small text file stored locally by the user. We can access it through a browser.

Tag Cloud is a collection of related articles. we can collect many articles, and many seo-optimized users will add some seo tags to the website, let's take a look at the complete php Tag Cloud production process. Tag Cloud is a collection of related

Gzip compression can help us save bandwidth. It can help us to compress 10 k files to 3 K. This ratio is very high. Next we can see that Nginx enables gzip compression (image, file, css) configuration. Gzip compression can help us save bandwidth. It

The json_encode function cannot perform the same operations on Chinese characters. If it is uft8, it will convert Chinese characters to u590fu5a03u7684u8bf1u60d. How can we output them to Chinese Characters? Let's take a look. The json_encode

To generate an IP address, we only need to generate a string. The ipv4 ip address data can be generated in the int storage space within the specified range. Let's take a look. to generate an IP address, we only need to generate a string. The ipv4 ip

Php implements the next article in the previous article. This article mainly uses SQL to judge based on the current id and then filter out the data before or after the current ID, let's take a look at the specifics. Php implements the next article