PHP generates random string UDFs

Detailed description of random string generation UDFs in PHP [Chinese supported] Detailed description of random string generation UDFs in PHP

/*** Generate a random string ** @ param int $ length the length of the random string to be generated * @ param string $ type: 0, number + uppercase letter; 1, number; 2, lower case letters; 3, upper case letters; 4, special characters;-1, number + upper case letters + special characters * @ return string */function randCode ($ length = 5, $ type = 0) {$ arr = array (1 => "0123456789", 2 => "abcdefghijklmnopqrstuvwxyz", 3 => "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 4 => "~ @ # $ % ^ & * () {} [] | "); If ($ type = 0) {array_pop ($ arr); $ string = implode ("", $ arr);} else if ($ type = "-1") {$ string = implode ("", $ arr );} else {$ string = $ arr [$ type] ;}$ count = strlen ($ string)-1; for ($ I = 0; $ I <$ length; $ I ++) {$ str [$ I] = $ string [rand (0, $ count)]; $ code. = $ str [$ I];} return $ code ;}

Let's talk about the functions of this function first.

You have used randCode () to call this function, and then passed in the parameter. $ length indicates the length of the random string to be generated, which is also the number of characters. $ type indicates the type of the generated string, there are four types written in the function. of course, you can add other types by yourself. that is to say, the characters in the strings generated for each type are determined by the characters contained in the array.

The following is the thinkphp framework. I think it is very powerful and can be recommended to you.

/*** Generate a random string, it can be used to automatically generate a password with a mix of 6 letters and numbers by default * @ param string $ len length * @ param string $ type string type * 0 Letter 1 digit other Mix * @ param string $ addChars extra character * @ return string */function rand_string ($ len = 6, $ type = '', $ addChars ='') {$ str = ''; switch ($ type) {case 0: $ chars = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz '. $ addChars; break; case 1: $ chars = str_repeat ('000000', 3); break; case 2: $ chars = 'abcdefghij KLMNOPQRSTUVWXYZ '. $ addChars; break; case 3: $ chars = 'abcdefghijklmnopqrstuvwxy '. $ addChars; break; case 4: $ chars = "when I come to him, I want to work in China. first, I want to work in order to become a citizen, so that I can come out and learn from others. the lower-level sub-accounts use their peers to say that they have lived a great deal of life, and after the sub-accounts are added to the social media and small hosts, they are also powered by the power line, the high volume of electricity, the party has to set the depth of the law to form the water physical competition starting from politics, 3, 3, and 10, without agricultural servers, and other anti-body and fighting routes map the things that are being discussed in the beginning from when two or more Tianzi event teams approve and emphasize their thoughts and internal reasons parts of the day phase by the pressure officer gas industry on behalf of the whole group number of fruit phase flat each base or month Mao ran if the shape of the mind-like dry are changed to ask more than show it most out of the governance I propose five solutions to the forest's rice clusters. 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default: // The confusing oOLl and number 01 are removed by default. to add the parameter $ chars = 'signature', use addChars '. $ addChars; break;} if ($ len> 10) {// The string is too long to repeat for a certain number of times $ chars = $ type = 1? Str_repeat ($ chars, $ len): str_repeat ($ chars, 5);} if ($ type! = 4) {$ chars = str_shuffle ($ chars); $ str = substr ($ chars, 0, $ len );} else {// random Chinese characters for ($ I = 0; $ I <$ len; $ I ++) {$ str. = msubstr ($ chars, floor (mt_rand (0, mb_strlen ($ chars, 'utf-8')-1), 1) ;}} return $ str ;}