PHP

This article is the main part of the PHP class on the $this,static,final,const,self of these key words to use the method. $this $this represents the current instance, using the form of $this->value= ' phpernote ' when the internal method of the

A UUID is a number generated on a single machine that guarantees that all machines in the same space-time are unique. Typically, the platform provides APIs for generating UUID. The UUID, based on the standard calculations developed by the Open

The PHP built-in function memory_get_usage () returns the amount of memory currently allocated to the PHP script in bytes (byte). In the actual development of the web, these functions are very useful, and we can use it to debug PHP code performance.

If you simply get the current access to your page's domain name, we only need to use PHP function Http_host can be done, if it is to extract the URL root domain name is required regular, below to look at a few concrete examples. It is very simple

PHP a line of code to get the file suffix name of the method to combine a lot of functions, we are a bit like the function of ASP, let's take a look at the next. Instance: The code is as follows $filename = '

  This article mainly introduces PHP to use multiple processes to control file read and write examples, need friends can refer to the following The code is as follows: 0) { usleep (rand (1, 10000)); &N Bsp } $retries + 1; }while (!flock ($

  This article mainly introduces PHP to write session to the database example, need friends can refer to the following Code as follows: 6));

  When you need to download a PDF file, if not processed directly in the browser to open the PDF file, and then need to save by saving the download file, the following through PHP to download the pdf file directly We sometimes encounter situations

This article mainly describes how to solve the problem of PHP can not upload more than 8M files, the need for friends to refer to the nextDevelop a file upload share site, once wanted to use the following code to implement the file upload function:

Database query results can not be used directly, such as MySQL, such as the results in the statement, so you need to sort the results in some way. Example 4. Sort database results Each cell in the data array in this example represents a row in a

  This article mainly introduces PHP to read the contents of the three ways, the need for friends can refer to the following PHP three ways to read the contents of a file: //************** The first way to read ***************************** code

  This article is mainly for you to share a super good PHP header download function, need friends can refer to the following The code is as follows:

This article mainly introduces the use of Get_object_vars () method in PHP, the example analyzes the Get_object_vars () method to get the attributes of the object, the need for friends can refer to the This article analyzes the use of the

　　Singleton mode : Makes an object of a class the only instance in the system. The most common use of a single case pattern in PHP is database operations. To avoid having multiple connections to the database in the system, wasting system resources,

tonight, when writing a form validation class for a framework, you need to determine whether a string length is within a specified range, and naturally, think of the strlen function in PHP. . The code is as follows: $str = ' Hello world! ';

Many times the use of PHP nowdoc HereDoc insert a lot of HMTL did not succeed, the same hint syntax problems, in fact, PHP manual notes that is written, it is very strangeFinally found the problem, the original document at the end, must be close to

 php reference (that is, precede a variable or function, object, and so on & symbol), referenced in PHP means: different names to access the same variable content. There is a difference between the pointers in the C language. In the C language, the

The extract function is used to decompose a number into variables for direct use, and the following is the interpretation of the extract: The PHP () function imports variables from the array into the current symbol table. For each element in the

There are many ways to launch XSS attacks on a Web site, and just using some of the built-in filter functions of PHP is not going to work, even if you will Filter_var,mysql_real_escape_string,htmlentities,htmlspecialchars , strip_tags These

If PHP is already compiled on the system, then you need to add a new extension. One way is to recompile PHP completely, another way is to compile the extensions separately, in extension form. The following is an example of installing Curl