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PHP生成随机字符串的几种方法

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Release: 2016-06-06 20:12:49
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#方法1 function make_password( $length = '8'){ $range = array_merge( range('a', 'z') , range('A', 'Z') , range('0','9')); shuffle($range); $range = array_slice($range,0, $length); $password = implode('' , $range); return $password;} 评价:

#方法1

function make_password( $length = '8'){
    $range = array_merge( range('a', 'z') , range('A', 'Z') , range('0','9'));
    shuffle($range);
    $range = array_slice($range,0, $length);
    $password = implode('' , $range);
    return $password;
}
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评价:看起来比较舒服,可以根据需求 自定义字符集,缺点是效率低。

#方法2

function generate_password( $length = 8 ) {
    // 密码字符集,可任意添加你需要的字符
    $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}~`+=,.;:/?|';
    $password = '';
    $chars_max_index = strlen($chars)-1;
    for ( $i = 0; $i 
<h4>评价:高效,因为仅使用了一个<code>mt_rand()</code>函数;可以根据需求 自定义字符集,不过看起来有点乱。</h4>
<h3><strong>#方法3</strong></h3>
<pre class="brush:php;toolbar:false">function create_password($pw_length = 8)
{
    $randpwd = '';
    for ($i = 0; $i 
<h4>评价:非常高效,利用ASCII码和<code>mt_rand()</code>,<code>chr()</code>完成随机字符串;可以根据需求 自定义字符集。</h4>
<h3><strong>#方法4</strong></h3>
<pre class="brush:php;toolbar:false">function get_password( $length = 8 )
{
    $str = substr(md5(time()), 0, 6);
    return $str;
}
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评价:尼玛。

source:php.cn
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