本文執行個體總結了php常用字串String函數。分享給大家供大家參考,具體如下:
nl2br
功能:化分行符號為<br>
<?php$str = "cat isn't \n dog";$result = nl2br($str);echo $result;/**結果cat isn'tdog*/
rtrim
功能:清除右邊的空白
<?php$str = "Hello world ";echo strlen($str)."<br>";$result = rtrim($str);echo strlen($result);/**結果1411*/
strip_tags
功能:清除字串中html和php的標記
<?php$str = "<font color = 'red'>Hello world</font>";$result = strip_tags($str);echo $result;/**結果Hello world*/
strtolower 與 strtoupper
功能:轉換成大小寫
<?php$str = "Hello World!";$result = strtolower($str);echo $result."<br>";$result = strtoupper($str);echo $result;/**結果hello world!HELLO WORLD!*/
trim
功能:去除首尾空格
<?php$str = " Hello World! ";$result = trim($str);echo $str."<br>";echo $result."<br>";echo strlen($str)."<br>";echo strlen($result);/**結果Hello World!Hello World!1612*/
str_ireplace
功能:替換
<?php$str = "zhang san";$result = str_ireplace("zhang","li",$str);echo $str."<br>";echo $result;/**結果zhang sanli san*/
str_repeat
功能:將一個字串重複多遍
<?php$str = "Hello jiqing!";$result = str_repeat($str,4);echo $str."<br>";echo $result;/**結果Hello jiqing!Hello jiqing!Hello jiqing!Hello jiqing!Hello jiqing!*/
str_replace
功能:區分大小寫替換
<?php$str = "hello jiqing!";$result1 = str_ireplace("Hello","Hi",$str); //不區分大小寫$result2 = str_replace("Hello","Hi",$str); //區分大小寫echo $str."<br>";echo $result1."<br>";echo $result2."<br>";/**結果hello jiqing!Hi jiqing!hello jiqing!*/
str_word_count
功能:返回字串中單詞的個數
<?php$str = "hello jiqing a!";$result1 = str_word_count($str); //返回個數$result2 = str_word_count($str,1); //返回數組echo $str."<br>";echo $result1."<br>";print_r($result2);/**結果hello jiqing a!3Array ( [0] => hello [1] => jiqing [2] => a )*/
strlen
功能:返回字串長度
<?php$str = "hello jiqing a!";$result = strlen($str);echo $result;/**結果15*/
substr_count
功能:計算一個字串在另一個字串中的個數
<?php$str = "hello jiqing ,hello jim!";$result = substr_count($str,"hello");echo $result;/**結果2*/
substr_replace
功能:從某個位置開始替換
<?php$str = "hello jiqing ,hello jim!";$result = substr_replace($str,"zhangsan",6);echo $result."<br>";$result = substr_replace($str,"zhangsan",6,6);//從某個位置替換,替換幾個字串echo $result;/**結果hello zhangsanhello zhangsan ,hello jim!*/
substr
功能:擷取子字串
<?php$str = "abcdef";$result = substr($str,0,1); //從第0個開始,擷取1個echo $result."<br>";$result = substr($str,0,-1);//從第0個開始,擷取到除了最後一個的字串echo $result."<br>";$result = substr($str,2,-1);//從第2個開始,擷取到除了最後一個的字串echo $result."<br>";$result = substr($str,-3,-1);//從第-3個開始,擷取到除了最後一個的字串echo $result."<br>";$result = substr($str,-3,1);//從第-3個開始,擷取到除了最後一個的字串echo $result."<br>";/**結果aabcdecdeded*/
implode
功能:將數組轉化為字串
<?php$array = array("2016","6","3");$date = implode("/",$array);echo $date;/**結果2016/6/3*/
md5
功能:對字串進行md5加密
<?php$str = "Hello world";$result = md5($str);echo $result;/**結果3e25960a79dbc69b674cd4ec67a72c62*/
以上就是(實用篇)php常用字串函數執行個體總結【轉換,替換,計算,截取,加密】的內容,更多相關內容請關注topic.alibabacloud.com(www.php.cn)!