php 工具类
1 php 生成唯一requestid 类 【v>7.1】
2 php生成带logo二维码
3 php 基于redis使用令牌桶算法实现流量控制
5 php好用的组件列表
1 请求，时间格式化，压缩，ftp 扩展包
1）获取数组维度
function arrayLevel ($arr ){ $al = array( 0 );
$this -> aL( $arr ,$al );
return max ($al );}
function aL ($arr , &$al , $level= 0 ){
if ( is_array( $arr )){
$level ++ ;
$al [] = $level ;
foreach ( $arr as $v ){
$this-> aL ($v , $al, $level );}}}
2）在任一指定的键值后插入元素
function insertAnyelement ($arr , $key, $varr ){
$keys = array_keys( $arr );
$kindex = array_search( $key ,$keys );
$arr1 = array_slice( $arr ,0 ,( $kindex+ 1 ));
$arr2 = array_slice( $arr ,($kindex + 1));
$rs= array_merge ($arr1 , $varr, $arr2 );
return $rs ;}
3）截取中文字符串
function chinesesubstr($str,$start,$len){
$strlen=$start+$len;
for($i=0;$i<$strlen;$i++){
if(ord(substr($str,$i,1))>0xa0){
$tmpstr.=substr($str,$i,2); $i++;
}else{ $tmpstr.=substr($str,$i,1); }
return $tmpstr; } }
4）去除文本中的html代码
function cutstr_html($string, $sublen)
{ $string = strip_tags($string);
$string = preg_replace ('/
/is', '', $string);
$string = preg_replace ('/ | /is', '', $string);
$string = preg_replace ('/ /is', '', $string);
preg_match_all("/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/", $string, $t_string);
if(count($t_string[0]) - 0 > $sublen) $string = join('', array_slice($t_string[0], 0, $sublen).'...');
else $string = join('', array_slice($t_string[0], 0, $sublen));
return $string; }
5) 生成随机码及加密函数
function password($password)
{ /**后续整强有力的加密函数*/
return md5('Q' . $password . 'W');}
$token = password(uniqid(rand(), true));
$salt = random(10);
$identifier = password($user['uid'] . md5($user['user'] . $salt));
$auth = $identifier . ',' . $token;
判断数据的编码，同时转为统一的utf8 编码
$encode = mb_detect_encoding(trim($v), array("ASCII",'UTF-8',"GB2312","GBK",'BIG5'));
$model[$k] = iconv($encode, 'utf-8', trim($v));
获取中文汉字长度
mb_strlen($name,"utf-8"); 【需开启php_mbstring扩展】