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ltrim();//È¥µô×Ö·û´®×ó¿Õ¸ñ;
rtrim();//È¥µô×Ö·û´®ÓÒ¿Õ¸ñ;
trim(); //È¥µô×Ö·û´®Á½±ß¿Õ¸ñ;
         //È¥µô¿Õ¸ñÊÇ·µ»ØÒ»¸öеÄ×Ö·û´®;Ô­×Ö·û´®²»±ä;
strlen();     //¼ÆËã×Ö·û´®³¤¶È;
strrev();     //½«×Ö·û´®µßµ¹µÄº¯Êý;
strtolower();//½«×Ö·û´®´óдת»»³ÉСд,Ô­À´Ð¡Ð´µÄ²»±ä;
strtoupper();//½«×Ö·û´®Ð¡Ð´×ª»»³É´óд,Ô­À´´óдµÄ²»±ä;
ucfirst();   //½«×Ö·û´®ÖеÚÒ»¸ö×Ö·ûת³É´óд;
ucwords();   //½«×Ö·û´®ÖÐÿһ¸öµ¥´ÊµÄÊ××Öĸת³É´óд;
str_repeat() //ÖØ¸´ÏÔʾ×Ö·û´®,µÚ¶þ¸ö¶ÔÊýÉè¶¨ÖØ¸´´ÎÊýstr_repeat($str,rand(1,10))
explode(string separator,string string,[ ,int limit]);//ʹÓÃÒ»¸ö×Ö·û´®·Ö¸îÁíÒ»¸ö×Ö·û´®;
     string separator://ÊDZ»°´ÕÕ·ÖµÄ×Ö·û´®;
     string string:   //ÊDZ»·ÖµÄ×Ö·û´®;
     int limit:       //ÏÞÖÆ×÷ÓÃ,ÈçΪ3,¼´Ç°Á½¸ö²¿·Öµ¥¶À·Ö¿ª,ÆäËûºóÃæÎªÒ»²¿·Ö;
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     string glue://×Ö·û´®Á¬½ÓµÄ·ûºÅ;
join()(imploadµÄ±ðÃûº¯Êý)://ºÍimploadÊÇÒ»ÑùµÄÓ÷¨;
//×Ö·û´®½ØÈ¡
substr(string string, int start [ ,int length]);//È¡²¿·Ö×Ö·û´®;
mb_substr()
mb_strcut()
   <?php
   echo mb_substr('ÕâÑùÒ»À´ÎÒµÄ×Ö·û´®¾Í²»»áÓÐÂÒÂë^_^', 0, 7, 'utf-8');
   ?>
   Êä³ö£ºÕâÑùÒ»À´ÎÒµÄ×Ö
   <?php
   echo mb_strcut('ÕâÑùÒ»À´ÎÒµÄ×Ö·û´®¾Í²»»áÓÐÂÒÂë^_^', 0, 7, 'utf-8');
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strchr()//strstr()µÄ±ðÃûº¯Êý,Ó÷¨Ò»Ñù;
strpos(string, char, [int offset]);//·µ»ØÄ³×Ö·û´®ÖÐij¸ö×Ö·û"×îÏÈ"³öÏÖµÄλÖÃ;
     char://Ö¸¶¨µÄ×Ö·û;


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error_reporting(2047);#±¨¸æËùÓзǷ¨µÄ´íÎó
ob_start();
function RMB ($RMB=0,$Format='') {
/*
*/
$RMB=@preg_Replace(
array('/([, ]|£¤|0$|)/','/(.){2,}/'),
array('','.'),
$RMB);
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