PHP生成短信验证码

时间:2022-05-24 04:23:31

简单版本

<?php
function generate_code($length = 6) {
$min = pow(10 , ($length - 1));
$max = pow(10, $length) - 1;
return rand($min, $max);
}

复杂版本(java)

public static String createRandom(boolean numberFlag, int length){
String retStr = "";
String strTable = numberFlag ? "1234567890" : "1234567890abcdefghijkmnpqrstuvwxyz";
int len = strTable.length();
boolean bDone = true;
do {
retStr = "";
int count = 0;
for (int i = 0; i < length; i++) {
double dblR = Math.random() * len;
int intR = (int) Math.floor(dblR);
char c = strTable.charAt(intR);
if (('0' <= c) && (c <= '9')) {
count++;
}
retStr += strTable.charAt(intR);
}
if (count >= 2) {
bDone = false;
}
} while (bDone); return retStr;
}