PHP

PHP5.5 describes the simplest way to create and verify a hash. We will first discuss the password_hash () function. This will be used as the hash value for creating a new password. It contains three parameters: password, hash algorithm, and option.

PHP string length calculation-strlen () function usage introduction. The strlen () function and the mb_strlen () function are in PHP. the strlen () function returns the length of the string. The function prototype is as follows: Copy the code as

54. improve PHP programming efficiency and introduce Cache mechanism to improve performance. 0. replace double quotation marks with single quotes to include strings. this will be faster. Because PHP will search for variables in strings enclosed by

8 best PHP libraries. The purpose of the PHP Standard Library (SPL) is to provide a set of interfaces for developers to make full use of object-oriented programming in PHP5. Therefore, we have collected eight of the best PHP Standard libraries to

Codeigniter provides examples of uploading multiple files. Copy the code as follows :? Phpif (! Defined (BASEPATH) {exit (Nodirectscriptaccessallowed);} *** Multi-Upload ** ExtendsCodeIgnitersnativeUploadclasstoaddsupport The code is as follows:

Php instance code that calculates the age based on the ID number. Copy the code as follows :? PhpfunctiongetAgeByID ($ id) {if ($ id) return; $ datestrtotime (substr ($ id, 6, 8 )); get the date of birth The code is as follows: Function

PHP jump to the pre-login page after login implementation ideas and code. Recently, I had a small project that gave me access to PHP programming. The simple login function is OK. However, in actual use, I found A problem: User A sent A link to User

PHP generates 3D percentage graph statistics. PHP generate 3D percentage graph statistical result this program is based on the user's data to generate a 3D percentage graph statistical effect a bit like the Chinese webmaster php Tutorial to generate

PHP implements the html pdf file generation program. This article introduces how to use HTML2FPDF and wkhtmltoimage in linux to directly generate pdf files on webpage html. I hope this method will be helpful to you. Finally, I found a method to use

Php performs the entire function (floor, ceil, round, intval ). In php, the entire function has four functions, such as floor, ceil, round, and intval. next I will introduce the application instances between them. Floor rounding method: floatfl has

Session Learning notes in php. Session refers to the time that a user spends browsing a website from entering the website to closing the browser. From the above definition Session, it refers to the time that the user spends browsing a website from

If the preg_match regular expression matches, the system prompts pcre. backtrack_limit. This article introduces the pcre. backtrack_limit solution for the preg_match regular expression matching prompt. if you need it, refer to it. Use the preg_match

Php checks whether a file exists. Php is very easy to determine whether a file exists in php. you only need a function: file_exists (file path). This function is generally used to determine whether a file exists, however, it is very easy for php to

In php, the fgetcsv function imports the csv file into the mysql database. This article will introduce the fgetcsv function to the specific functions of the mysql database for importing csv files. you can also find a solution to Chinese garbled

Use the Throw keyword for the exception handling mechanism of PHP5. After an Exception object is created, you can return the object, but you should not use it like this. a better way is to use the keyword throw instead. Throw is used to throw an

The PHP computing time period is the day of the week, the day after the current time and the time difference between the date. These time functions have been released. you don't need to use them! If you have any questions, you can leave a message

How to use the Mcrypt extension library for encryption and decryption. Summary: Mcrypt2.4.7 is a powerful Extension Library for encryption algorithms. It includes 22 algorithms, including the following algorithms :???? BlowfishRC2Safer-sk64xtea ????

MySQL manual version 5.0.20-MySQL optimization (2) (1) (3 ). The connection type is the same as that of ALL. The difference is that it only scans the index tree. It is usually faster than ALL because the index file is usually smaller than the data

Phpmssql database connection code (12 ). Php Tutorial mssql Database tutorial connection class code classDB_ SQL {var $ Host; var $ Database; var $ User; var $ Password; var $ Link_ID0; var $ Query_ID0; var $ Recordarr php Tutorial mssql database

Php outputs an excel file. If you want to use php to output excel files, you must use headercontent-type: applicationvnd. ms-excel. As follows? Php $ filenamename.. php Tutorial output excel format file If you want to use php to output an excel file,