10 recommended content of uniqid() function

The application scenarios for generating unique IDs are very common, such as temporary cache file names, temporary variables, temporary security codes, etc. The uniqid() function generates a unique ID based on the current time in microseconds. Since generating a unique ID is tied to microsecond time, the uniqueness of the ID is very reliable. The generated unique ID returns a string that is 13 strings long by default. If the prefix of the unique ID is not defined, it can return up to 23 strings long. If combined with the md5() function, the reliability of the generated unique ID will be higher. , the biggest advantage of this generated ID over random ID is that it can be sorted, especially some values ​​that need to be stored in the database. 1. The function prototype string uniqid ([string prefix [, bool more_entropy]]) can define the prefix and length of the unique ID. 2. The version is compatible with PHP 3, PHP 4, PHP 5. 3. Basic usage and example of the function 1, generate a unique ID< ;?php echo&nb

1. Use PHP uniqid function to generate unique ID

##Introduction: Application scenarios for generating unique IDs are very common, such as temporary cache file names, temporary variables, temporary security codes, etc. The uniqid() function generates a unique ID based on the current time in microseconds. Since generating a unique ID is associated with microsecond time, the uniqueness of the ID is very reliable

2. php Common Functions (1)

#Introduction: In daily development, most novices are confused about how to remember so many PHP built-in functions. In fact, as long as you know that there is This thing is OK. You will naturally remember it when you use it a lot. Below is a collection of the most commonly used functions when developing PHP. I hope it will be helpful to you. Some common functions of PHP are recorded. The usleep() function delays code execution for several microseconds. The unpack() function unpacks data from a binary string. The uniqid() function generates a unique ID based on the current time in microseconds. time_s...

3. Common PHP functions [Part 1]

##Introduction: In daily development, most novices are confused about how to remember so many PHP built-in functions. In fact, as long as you know that there is such a thing, it will be OK. When you use it a lot, you will naturally Just remember it. Below is a collection of the most commonly used functions when developing PHP. I hope it will be helpful to you. Some common functions of PHP are recorded. The usleep() function delays code execution for several microseconds. The unpack() function unpacks data from a binary string. The uniqid() function generates a unique ID based on the current time in microseconds. time_s...

4.

php Several solutions to generate unique ids_PHP tutorial

Introduction: Several solutions to generate unique ids in php. After checking online, there are many methods 1. md5(time() . mt_rand(1,1000000)); This method has a certain probability of duplication 2. PHP built-in function uniqid() uniqid() function is based on micro Second Counter

5.

PHP5 Common Function List (Sharing)_PHP Tutorial

Introduction: PHP5 Common Function List ( share). As shown below: Copy the code The code is as follows: The usleep() function delays the execution of the code for a number of microseconds. The unpack() function unpacks data from a binary string. The uniqid() function is based on microseconds

6.

PHP5 Common Function List Overview_PHP Tutorial

Introduction: Overview of the list of commonly used functions in PHP5. The usleep() function delays code execution for a number of microseconds. The unpack() function unpacks data from a binary string. The uniqid() function generates a unique

7 based on the current time in microseconds.

Detailed interpretation of PHP techniques for obtaining remote images_PHP tutorial

Introduction: Detailed explanation of PHP techniques for obtaining remote images. PHP code example for obtaining remote images: functiongethttpimage($url){ set_time_limit(0); if(!empty($url)){ $ imgUrl = date ('Y-m',time()).'/'. uniqid( ).strrchr($url,.); $ imgPath = APP_

8. PHP Common Functions_PHP Tutorial

Introduction: A complete list of commonly used functions in PHP. The php usleep() function delays code execution for a number of microseconds. The unpack() function unpacks data from a binary string. The uniqid() function generates a unique id based on the current time in microseconds

9. Using the uniqid() function in php to generate a unique id_PHP tutorial

Introduction: Use the uniqid() function in PHP to generate a unique ID. Use the uniqid() function in php to generate a unique id function createId($prefix = ){ $str = md5(uniqid(mt_rand(), true)); return $prefix . $str;}//uniqid(prefix,more_entropy) uniqid() function base

10. PHP's uniqid() function usage, phpuniqid function usage_PHP tutorial

Introduction: PHP uniqid() function usage, phpuniqid function usage. Usage of uniqid() function in PHP, usage of phpuniqid function. This article describes the usage of uniqid() function in PHP with examples. Share it with everyone for your reference. The specific method is analyzed as follows: uniqid() function base

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