unset array

MongoDB Update character manipulationZhang Ying published in 2014-07-23Category list: NoSQLTags: $inc, $rename, $set, $unset, MongoDB, Multi, update, UpsertThe following commonly used update operation, with the mongodb2.6.3 version of the test, the

/*** Export SQL file*/Public Function Exportsql () {Database tables that need to be exported are stored in the array$tables =array ("T_crm_queue_fail", "T_crm_queue");Define a variable to hold the SQL statement$content = ";Open and write to the SQL

Conditional Select if statement 选择执行： 注意：if语句可嵌套 单分支 if 判断条件;then 条件为真的分支代码 fi 双分支 if 判断条件; then 条件为真的分支代码 else条件为假的分支代码 fi 多分支 if 判断条件1; then 条件为真的分支代码 elif 判断条件2; then 条件为真的分支代码 elif 判断条件3; then

Tag:php    algorithm     /* * This program takes a random number of different elements from a non-repeating array * The difficulty is to prevent the occurrence of the number of times that have already been taken (especially to the end), need to

This article will share eight essential PHP functions, all of which are very useful: passing any number of function parameters and using glob () search for files, obtain memory usage information, obtain CPU usage information, obtain system constants,

Php randomly extracts several different number instances from an array, and retrieves instances from the php array. The first algorithm, other people's ideas on CSDN $ Num = 0; $ array = array (1, 2, 3, 4, 5, 6, 7, 8, 9); $ arr = array (); $ g = 5; $

PHP Optimization for PHP is mainly for php. the main parameters in ini are adjusted and set properly. Let's take a look at php below. how to set parameters that have a greater impact on performance in ini.# Vi/etc/php. ini (1) Disable finding PHP

Common methods of regular expressions:#preg_replace (Regular expression, "X", $STR) replaces the regular expression in the string with the X-#preg_spilt (regular expression, $str) separates the string from where it satisfies the regular expression,

The json_encode () built-in function (php> 5.2) in php can be used to transmit and use data in php with other languages. This function converts a value to a json data storage format. [Php]$ Arr = array('Name' => 'chia ','Age' => 20); $ Jsonencode =

Call TextMagic ++ API.// Include the TextMagicPHP libRequire ('textmagic-sms-api-php/TextMagicAPI. php ');// Set the username andpassword information$ Username = 'myusername ';$ Password = 'mypassword ';// Create a new instanceof TM$ Router = new

Introduction to PHP performance optimization. PHP optimization for PHP is mainly for php. the main parameters in ini are adjusted and set properly. let's take a look at php below. how to optimize some parameters in ini that have a major impact on

This article mainly introduces the message reply class of the public platform developed by the public account, provides its complete example, and provides annotations to facilitate understanding and application, it is of great reference value for

This article mainly introduces php's method of finding specific values in multi-dimensional arrays. The example analyzes php's skills for traversing multi-dimensional arrays and unset deletion, which has some reference value, for more information

Some PHP performance optimization + my own opinions + explanations. PHP optimization for PHP is mainly for php. the main parameters in ini are adjusted and set properly. let's take a look at php below. some parameters in ini that have a major impact

The following small series will introduce nine php functions and features that you must know and can use. Very practical! If you need a friend, you can refer to the following nine useful functions in PHP. do you know you have used them? 1. any

PHPJSON Chinese. The json_encode () built-in function (php5.2) in php can be used to transfer data in php well with other languages and use it. This function is used to convert a value to j. use the json_encode () built-in function in php (php> 5.2)

The last time I shared the differences between the comparative text, this time I will compare the changes in the folder. this class can compare the files in the two directories and find the changes. It traverses the list of files retrieved from two

This article explains in detail how PHP randomly retrieves several different numbers from an array. PHP randomly retrieves several different numbers from an array. The first algorithm, other people's ideas on CSDN $ Num = 0; $ array = array (1, 2, 3

This article mainly introduces the common functions of eight PHP programmers. if you need a friend, you can refer to the programmers who have developed PHP. it should be clear that PHP has many built-in functions to master them, this article will

Phpunset: How to delete array variables. To delete data and variables, you can use the unset function in php. of course, you can also use the null function to process them. However, you can destroy the variable so that the php variable disappears in