如何在某个索引后停止爆炸功能.
例如
例如
<?PHP $test="The novel Prognosis Negative by Art Vandelay expresses protest against many different things. The story covers a great deal of time and takes the reader through many different places and events,as the author uses several different techniques to really make the reader think. By using a certain type of narrative structure,Vandelay is able to grab the reader’s attention and make the piece much more effective and meaningful,showing how everything happened"; $result=explode(" ",$test); print_r($result); ?>
如果只想使用前10个元素怎么办($result [10])
一旦填充了10个元素,如何停止爆炸功能.
一种方法是先将字符串修剪到前10个空格(“”)
有没有其他方法,我不想将限制后的剩余元素存储在任何地方(使用正限制参数完成)？
那个函数的第三个参数是什么？
array explode ( string $delimiter,string $string [,int $limit ] )
看看$limit参数.
手册：http://php.net/manual/en/function.explode.php
手册中的一个例子：
<?PHP $str = 'one|two|three|four'; // positive limit print_r(explode('|',$str,2)); // negative limit (since PHP 5.1) print_r(explode('|',-1)); ?>
以上示例将输出：
Array (
[0] => one
[1] => two|three|four ) Array (
[0] => one
[1] => two
[2] => three )
在你的情况下：
print_r(explode(" ",$test,10));
根据PHP手册,当你使用limit参数时：
If limit is set and positive,the returned array will contain a
maximum of limit elements with the last element containing the rest of
string.
因此,您需要摆脱数组中的最后一个元素.
你可以使用array_pop(http://php.net/manual/en/function.array-pop.php)轻松完成.
$result = explode(" ",10);
array_pop($result);
