php join() 函数,phpjoin函数
php join() 函数,phpjoin函数
php join() 函数获取由数组元素组合成的字符串。本文章向码农介绍php join() 函数的使用方法和基本实例,感兴趣的码农可以参考一下。
定义和用法
join() 函数返回由数组元素组合成的字符串。
join() 函数是 implode() 函数的别名。
注释:join() 函数接受两种参数顺序。但是由于历史原因,explode() 是不行的,您必须保证 separator 参数在 string 参数之前才行。
注释:join() 函数的 separator 参数是可选的。但是为了向后兼容,推荐您使用使用两个参数。
语法
<code class="php hljs">join(separator,<span class="hljs-keyword">array)</span></code>
参数 | 描述 |
---|---|
separator | 可选。规定数组元素之间放置的内容。默认是 ""(空字符串)。 |
array | 必需。要组合为字符串的数组。 |
技术细节
返回值: | 返回由数组元素组合成的字符串。 |
PHP 版本: | 4+ |
更新日志: | 在 PHP 4.3.0 中,separator 参数变成可选的。 |
实例
用不同的字符分隔数组元素:
<?php $arr = array('Hello','World!','I','love','Shanghai!'); echo join(" ",$arr)."<br>"; echo join("+",$arr)."<br>"; echo join("-",$arr)."<br>"; echo join("X",$arr); ?>
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