wudi

var randNum = function (min, max) {
        return parseInt(Math.random() * (max - min + 1) + min, 10);
};

wudi

一，ps和pt转换px:相对长度单位。像素（Pixel）。（PS字体）
pt:绝对长度单位。点（Point）。（iOS字体）公式如下：pt=(px/96)*72。二，字体间转换1in = 2.54cm = 25.4 mm = 72pt = 6pc
具体换算是： 
Points     Pixels    Ems     Percent 
6pt        8px      0.5em     50%    
7pt        9px      0.55em    55%    
7.5pt      10px     0.625em   62.5%    
8pt        11px     0.7em     70%    
9pt        12px     0.75em    75%    
10pt       13px     0.8em     80%    

wudi

<?php

$str = '82a16300 a16482a9 61737365 745f6b65 79da002a 31343130 37383632 33333538 61393737 63363732 61393836 61353333 39303238 61363035 35343261 3832a564 65627567 da005968 7474703a 2f2f3139 322e3136 382e3738 2e31373a 38303830 2f63646e 5f617373 6574732f 61756469 6f2f3230 31343039 2f31352f 62633537 61353430 34333461 31656534 38386132 30386632 64643733 37316135 2e616d72';

$str = str_replace(' ','',$str);
for($i =0; $i<strlen($str); $i+=2){
	$char = substr($str, $i,2);
	$dec_str = hexdec($char);
	echo chr($dec_str);
}

wudi

<?php

$dbConnection = new PDO('mysql:dbname=dbtest;host=127.0.0.1;charset=utf8', 'user', 'pass');

$dbConnection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);