本篇文章为大家展示了php中str_replace()函数的作用是什么,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
str_replace()的语法:
str_replace mixed $search ,mixed $replace, mixed $subject [, int &$count ] ) : mixed
1.search ,replace都是字符串
<?php$bodytag = str_replace("%body%", "black", "<body text='%body%'>");echo $bodytag; //输出:<body text='black'>?>
2.search是数组 ,replace是字符串
<?php$vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U");$onlyconsonants = str_replace($vowels, "", "Hello World of PHP");echo $onlyconsonants;// 输出: Hll Wrld f PHP?>
3.search ,replace都是数组
<?php$phrase = "You should eat fruits, vegetables, and fiber every day.";$healthy = array("fruits", "vegetables", "fiber");$yummy = array("pizza", "beer", "ice cream");$newphrase = str_replace($healthy, $yummy, $phrase);//输出:You should eat pizza, beer, and ice cream every day?>
4.含有第三个参数
<?php$str = str_replace("ll", "", "good golly miss molly!", $count);echo $count;// 赋值: 2?>
ps: search ,replace的第一组替换会影响到第二组,如下
$search = array('A', 'B', 'C', 'D', 'E');$replace = array('B', 'C', 'D', 'E', 'F');$subject = 'A';echo str_replace($search, $replace, $subject)."<br/>";// 输出 F ,因为 A 被 B 替换,B 又被 C 替换,以此类推...// 由于从左到右依次替换,最终 E 被 F 替换
上述内容就是php中str_replace()函数的作用是什么,你们学到知识或技能了吗?如果还想学到更多技能或者丰富自己的知识储备,欢迎关注编程网行业资讯频道。