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str_replaced函数的问题？

WBOY
Release： 2016-06-23 13:26:46
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$bodytext = str_replace("%body%", "black", "<body text='%body%'>");var_dump($bodytext);echo str_replace("world","John","Hello world!");
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输出

为什么var_dump($bodytext)会输出string(19) ""；是那里错了？设置还是语法？


回复讨论(解决方案)

$bodytext = str_replace("%body%", "black", "<body text='%body%'>");var_dump($bodytext);
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string(19) "

"

你只看到 string(19) ""  的原因是：你用浏览器查看时， 被当做 html 标记解释了，所以看不见

谢谢

应该要用字符实体表示，输出的值为空，是浏览器把它当成一个html标签了:
 $bodytext = str_replace("%body%", "black", "");
          var_dump($bodytext);
         echo str_replace("world","John","Hello world!");
不知道您是不是指的这个？

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str_replaced函数的问题？
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