PHP中使文本在特定长度处自动换行
PHP中你可以对一个字符串进行换行处理。例如，你想显示<pre>/</pre>标记中的文本，但希望这些文本能在正常大小的浏览器窗口中自动地换行。这时候我们可以PHP中的wordwrap()函数，如下代码所示：
<?php $s = "Four score and seven years ago our fathers brought forth↵ on this continent a new nation, conceived in liberty and↵ dedicated to the proposition that all men are created equal."; print "<pre>\n".wordwrap($s)."\n</pre>"; ?>输出结果：
<pre> Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal. </pre>在默认情况下，wordwrap()会按照每行75个字符来自动将文本换行。使用可选的第二个参数来指定不同的行长度，如下PHP代码所示:
<?php print wordwrap($s,50); ?>这样，其输出结果就变成了:
Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal.除了\n之外的其他字符也可以作为换行符。要想输出两个空行，可以用“\n\n“
<?php print wordwrap($s,50,"\n\n"); ?>其输出结果：
Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal.wordwrap()还有可选的第四个参数，用于控制对那些比指定的行长度值更长的单词的处理方式。如果这个参数值为1，超出指定长度的这些单词会换行；否则，这些单词就会保留原来的行长度：
<?php
print wordwrap('jabberwocky',5);
print wordwrap('jabberwocky',5,"\n",1);
?>其输出结果：
jabberwocky jabbe rwock y好了，PHP中使文本在特定长度处自动换行就介绍到这里了。
转载请注明：http://www.itivy.com/php/archive/2012/2/16/php-wordwrap-usage.html
我也来参与讨论
你还可以输入600/600个字符
发表评论
回复 2012-2-19 1:36:00 by bigtt
回复 2012-2-19 1:38:07 by gsergb