Comparison of efficiency performance between switch and IfElse in PHP

In PHP, two methods are used to determine whether a value satisfies a condition, and if it satisfies/does not satisfy a different action. No matter what language you write the program, you will certainly take into account the efficiency of the

PHP Chinese character validation code class function

002 Class Captcha 003 { 004 Private $_about = Array ( 005 ' imageline ' =>8,//Line interference, normal for 0 006 ' Imagepixel ' =>300,//pixel interference, normal for 0 007 ' Location ' =>true,//font random position, false normal 008 '

PHP Encryption Program

PHP Encryption Program Encryptionfunction Jiami ($data, $PSW) {For ($i =0, $j =0; $i $middle = Ord (substr ($data, $i, 1)) +Ord (substr ($PSW, $j, 1));if ($j > strlen ($PSW)) {$j = 0;}$str. =CHR ($middle);}return ($STR);}Decryptfunction Jiemi

PHP str_replace function arguments are used as arrays

Str_replace for string substitution The code is as follows Copy Code Str_replace ("PHP", "java", "PHP Tutorial 4");Java Tutorial 4?> The variable being searched is a string The code is as follows

PHP array removal null value Array_filter () method

Function name: Array_filter ()Call mode: Array_filter ($array)Parameter description: $array is the object of operation, we will delete the empty element Instance: The code is as follows Copy Code $array = (' A ' => '

PHP foreach pass value or pass reference

The use of foreach () in PHP foreach () has two uses: 1: The code is as follows Copy Code foreach (Array_Name as $value){Statement} The array_name here is the array name you want to traverse, each time the

PHP Tree Program code is not implemented recursively

The code is as follows Copy Code /*** Create parent Node tree array* Parameter* $ar Array, adjacency list of data organized by* $id subscript or associated key name in the array as the primary key* $pid subscript or associated key

PHP Displays all directories under the Web directory and filename with php,php3,htm,html suffix

The first file name is Phplist.inc The code is as follows Copy Code ?Global $htmlroot;$htmlroot = "/web/html"; "/web/html" is the Apache document root directory that users can modify according to their own configuration?>

PHP Novice on the road (i)

Brief introduction PHP is a server-side scripting language that is easy to learn and use. With minimal programming knowledge you can use PHP to create a truly interactive web site. This tutorial does not want you to fully understand the language,

Linux under the PHP installation MONGO expansion steps Tutorial

fpm

MONGO db is a good thing and more and more projects are being used. The following describes how to install the MONGO extension Environment nginx/1.4.4PHP 5.4.22MongoDB 2.4.10 Download Extended installation Package wget

The current situation and prospect of PHP development framework

With the popularity of the Ruby on Rails, the popular Web application scripting language of PHP also has a large number of new generation development frameworks. At the same time, the domestic PHP developers in Beijing office began to closely follow

Using Interstellar QuickStart PHP object-oriented Programming (Revised edition)

Objective Object-oriented and profound, for never contact with people, will feel confused. Learning A lot of information, but mostly more abstract, so I use the classic game-StarCraft to discuss the object-oriented PHP . Now let's assume that we're

Php implements a to z and its "strange phenomenon"

Version 1:For ($ I = ord ('A'); $ I Echo chr ($ I );}Version 2 (similar to the first version using ascii ):For ($ I = 0; $ I Echo chr ($ I + 97 );}Version 3:Echo implode ('', range ('A', 'z '));Version 4 ):For ($ I = 'a'; $ I! = 'A'; $ I ++ ){Echo $

Php inserts a data instance in the specified row of the file

For PHP file operations, it is complicated to insert data at the specified position. Let's take a look at the link and insert the data instance in the specified row of the file.$ ArrInsert = insertContent ("array. php", "abcdef", 3, 10 );Unlink

Use PHP to decode POP3 emails (1)

Get a preliminary understanding of the source file of the emailThis article briefly describes the principles of receiving and MIME mail through POP3 protocol, provides two Practical PHP classes for receiving and MIME decoding, and provides samples

PHP join () function tutorial

PHP join () function tutorialDefinition and usageReturns the content array of a string in the join () function.The join () function is an inplode () function of an alias.SyntaxJoin (separator, array)ParameterDescriptionSeparatorOptional. Specifies

Php unlimited classification code and principles

First category (parent category) --> second category (sub-category) --> third category (Sun category)The more kinship classification, the more complex and difficult it is to control programs and database tutorials. classification processing and

Experience: nginx php 502 bad gateway solution

The following error occurs when you access phpMyAdmin.PhpMyAdmin-ErrorCannot start session without errors, please check errors given in your PHP and/or webserver log file and configure your PHP installation properly.The first time you open the

How to use string functions in PHP

There are many character string operations in PHP, including the following:(1) echo, print, printf, sprintfThe first two functions are output strings. If there is a variable name in the string, it is replaced with its value.The last two functions

Statistics and sorting of PHP/Shell large files

Many large Internet companies have such a problem during interviews. There is a 4G file, how to use a machine with only 1 GB of memory to calculate the number of times the file appears to be multiple (assume that one row is an array, such as a QQ

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