php 字串處理函數大全教程

//截取字串
mb_substr($str,star,count,encode);
//擷取字串長度
mb_strlen();
//完整保留在textarea文本中的斷行符號換行
str_replace(chr(10),"<br />",$textarea);

//根據ascii返回相應的字母
echo "ascii為66的字母是:". chr(66)."<br>";

//chop 去除字串中的連續空格和空白
$str="         he llo wo rd     ";echo "s:";
echo "s:".chop($str)."w";

//explode 按照某個字元分割字串 返回數組
$str="green,red,yellow,white";
$arr=explode(" ",$str);echo "分割後的數組是:";
print_r($arr);

//implode 將數組按照某個字元拼成字串
$arr=array("a","b","c","d");
$str=implode('/',$arr);
echo "<br>拼成的字串是:".$str;

//列印print
print("列印的方法print");
echo "格式化列印printf:<br>";
printf("%f%",2,"d");

//不區分大小寫比較字串
echo "不區分大小寫:".strcasecmp("hello word","hello word");
//區分大小寫
echo "區分大小寫:". strcmp("hello word","hello word");

//尋找字串
echo "尋找的結果是:". strchr("hello word","hello");
//字串長度
echo "str長度:".strlen("hello word");

//將字串重複幾次str_repeat
echo "將字串重複幾次:".str_repeat("ws",3);

//將字串倒序排列
echo "zifuchuandaoxu:".strrev("zifuchuandaoxu");

//將字串大寫，小寫轉化
//strtolower();
//strtoupper();
//字串替換,
echo "替換後的字串是:". str_replace("b","*","aaaaabbbbbccccc");
//切割字串
echo "切割後的字串是:". substr("hello word",2,3);