PHP generates random numbers and strings_PHP tutorial

function rand_string($len = 6, $type = '', $addChars = '') {
$str = '';
switch ($type) {
case 0 :
                 $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' . $addChars;
break;
case 1 :
                $chars = str_repeat ('0123456789', 3);
break;
case 2:
               $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . $addChars;
break;
case 3:
                 $chars = 'abcdefghijklmnopqrstuvwxyz' . $addChars;
break;
​​​​default:
                                                                                                                                                                                    oOLl and number 01 The easily confusing character oOLl and the number 01 are removed by default. To add them, please use the addChars parameter
                $chars = 'ABCDEFGHIJKMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz23456789' . $addChars;
break;
}  
If ($len > 10) { //The number of digits is too long and the string is repeated 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, $len);
} else {
                      // Chinese random words
for($i = 0; $i < $len; $i ++) {
$str .= msubstr ( $chars, floor ( mt_rand ( 0, mb_strlen ( $chars, 'utf-8' ) - 1 ) ), 1 );
         } 
}  
Return $str;
}

Excerpted from lpdx111’s column

http://www.bkjia.com/PHPjc/478170.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478170.htmlTechArticlefunction rand_string($len = 6, $type = , $addChars = ) { $str = ; switch ($ type) { case 0 : $chars = ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz . $addChars; break; case 1...