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This article introduces some of the functions of cryptography in PHP, please refer to your friends.The functions that implement encryption in PHP are as follows: 1,md5 () 2,sha1 () 3,crc32 () 4,crypt () 5,uniqid ()The 1,MD5 () function defines and

Based on common functions in PHP. Array_change_key_case-array array_chunk whose return string key names are all lowercase or uppercase-split an array into multiple array_combine-create an array, returns an array with the array value array_change_key_

The following is a detailed analysis of common functions in PHP. For more information, see array_change_key_case. the returned string key names are all lowercase or upper-case arrays. Array_chunk-divide an array into multiple Array_combine-creates

First, table Design Library names, table names, field names must be split with lowercase letters and "_". The library name, table name, and field name must be no more than 12 characters. The name of the library, table name, field

array_change_key_case-returns an array with a string key that is all lowercase or uppercase array_chunk-to split an array into multiple Array_combine-creates an array with the value of one array as its key name and the value of the other array as

I. A table of 200 million records, assuming that a record has 200 bytes, query a record using indexes and performance calculations that do not use indexes 1. Assume that the IOPS of the hard disk is 100 2. Index Length: 10 bytes (4-byte

Math function: 10 more commonly used standard red. abs-Absolute Value acos-Anti-cosine acosh-Inverse hyperbolic cosine asin-anyway Chord asinh-Inverse hyperbolic sine atan2-two-parameter tangent atan-anyway cut atanh-Inverse hyperbolic

As a PHP programmer, it is necessary to master and memorize some commonly used PHP functions, the following authors will be collected about the array aspects of PHP, PHP system aspects, PHP file processing aspects, PHP string processing, PHP

Math function: 10 of the more commonly used red. abs-Absolute Valueacos-Inverse cosineacosh-Inverse hyperbolic cosineasin-anyway Chordasinh-Inverse hyperbolic sineatan2-two parameters of the inverse tangentatan-anyway cutatanh-Inverse hyperbolic

First, table design1. Library name, table name, field name use lowercase letters, "_" split.2. The Library name, table name, field name is not more than 12 characters.3. The Library name, table name, field name are known, try to use nouns rather