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str_replaced函数的问题？

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Jun 23, 2016 pm 01:26 PM

$bodytext = str_replace("%body%", "black", "<body text='%body%'>");var_dump($bodytext);echo str_replace("world","John","Hello world!");

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);

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:
$bodytext = str_replace("%body%", "black", "1536d9fa4d8ecd51f224648278b5384b");
var_dump($bodytext);
echo str_replace("world","John","Hello world!");
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