10 Content recommendations for UNIQID () functions

The scenario for generating a unique ID is very common, such as temporary cache file names, temporary variables, temporary security codes, and so on, and the uniqid () function generates a unique ID based on the current time in microseconds. Because the generation of unique IDs is associated with microsecond time, the uniqueness of the IDs is very reliable. Generated unique ID The string returned by default has 13 strings long, if you do not define a prefix for a unique ID, you can return up to 23 string lengths, and if you combine the MD5 () function, the resulting unique ID will be more reliable, and this generated ID has the greatest advantage over the randomness of an ID that can be sorted. In particular, some values that need to be stored in the database. One, function prototype string uniqid ([string prefix [, bool more_entropy]) can define a unique ID prefix with length two, version compatible with PHP 3, PHP 4, PHP 53, function base usage and instance 1, generate a unique ID&L t;? Phpecho&nb

1. Generate a unique ID using the PHP uniqid function

Summary: Scenarios that generate unique IDs are common, such as temporary cache file names, temporary variables, temporary security codes, and so on, and the uniqid () function generates a unique ID based on the current time in microseconds. Unique ID is very reliable due to the generation of a unique ID associated with microsecond time

2. PHP common functions (1)

Introduction: In the daily development, most novice is very puzzled, so many PHP built-in function how to remember, in fact, you just know that there is this thing is OK, use more when you naturally remember, the following collection of PHP development when the most commonly used functions, I hope to help you. Some of the commonly used functions of PHP usleep () function delay code execution several microseconds. The unpack () function unpack the data from a binary string. The Uniqid () function generates a unique ID based on the current time in microseconds. Time_s ...

3. PHP common function "up"

Introduction: In the daily development, most novice is very puzzled, so many PHP built-in function how to remember, in fact, you just know that there is this thing is OK, use more when you naturally remember, the following collection of PHP development when the most commonly used functions, I hope to help you. Some of the commonly used functions of PHP usleep () function delay code execution several microseconds. The unpack () function unpack the data from a binary string. The Uniqid () function generates a unique ID based on the current time in microseconds. Time_s ...

4. PHP to generate a unique ID several workarounds _php tutorial

Summary: Several workarounds for PHP to generate a unique ID. Online search, there are a lot of methods 1, MD5 (Time (). Mt_rand (1,1000000)); This method has a certain probability of repetition 2, PHP built-in Functions uniqid () the Uniqid () function is based on microseconds

5. PHP5 Common Functions List (share) _php Tutorial

Summary: PHP5 common Functions List (share). As follows: The copy code code is as follows: the Usleep () function delays code execution for several microseconds. The unpack () function unpack the data from a binary string. The Uniqid () function is based on microseconds

6. PHP5 Common Functions List Overview _php Tutorial

Summary: PHP5 common Functions List Overview. The Usleep () function delays code execution for several microseconds. The unpack () function unpack the data from a binary string. The Uniqid () function generates a unique, based on the current time in microseconds.

7. A detailed explanation of PHP get remote picture tips _php Tutorial

Introduction: Detailed Interpretation of PHP to get remote picture skills. PHP gets a remote picture code example: Functiongethttpimage ($url) {set_time_limit (0), if (!empty ($url)) {$ imgurl = date (' Y-m ', Time ()). ' /'. Uniqid (). STRRCHR ($url,.); $ imgpath = App_

8. PHP Common functions Daquan _php tutorial

Introduction: PHP Common Functions Daquan. The PHP usleep () Function delays code execution for several microseconds. The unpack () function unpack the data from a binary string. The Uniqid () function generates a unique based on the current time in microseconds

9. Use the Uniqid () function in PHP to generate a unique id_php tutorial

Summary: PHP uses the uniqid () function to generate a unique ID. PHP uses the uniqid () function to generate a unique ID function Createid ($prefix =) {$STR = MD5 (Uniqid (Mt_rand (), true)), return $prefix. $str;} Uniqid (prefix,more_entropy) uniqid () function base

PHP uniqid () function usage, phpuniqid function usage _php Tutorial

Introduction: PHP uniqid () function usage, phpuniqid function usage. PHP uniqid () function usage, phpuniqid function Usage This example describes the use of the Uniqid () function in PHP. Share to everyone for your reference. The specific method is analyzed as follows: Uniqid () function base

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Two questions about PHP's uniqid () function?