如何使用preg_replace_callback()改写这个函数?
最近的项目,在更新完PHP以后发现preg_replace()在5.5.0版本起/e
修饰符已经被弃用了。然后不知道怎么改写
$source_content = preg_replace($search.'e', "'" . $this->_quote_replace($this->left_delimiter) . 'php' . "' . str_repeat(\"\n\", substr_count('\\0', \"\n\")) .'" . $this->_quote_replace($this->right_delimiter) . "'" , $source_content);
求大神指教
回复内容:
最近的项目,在更新完PHP以后发现preg_replace()在5.5.0版本起/e
修饰符已经被弃用了。然后不知道怎么改写
$source_content = preg_replace($search.'e', "'" . $this->_quote_replace($this->left_delimiter) . 'php' . "' . str_repeat(\"\n\", substr_count('\\0', \"\n\")) .'" . $this->_quote_replace($this->right_delimiter) . "'" , $source_content);
求大神指教
是preg_replace()
的/e
模式被废弃了,不是preg_replace()
被废弃了好么!!请不要以偏概全的说话!!搞得我一开始都吓尿了,还以为PHP特么怎么这么随便呢。
preg_replace_callback()
不是很简单么,就是用函数替换了用eval
执行字符串啊。不过说老实话没怎么看明白你的替换执行函数到底要干嘛,好像是要根据换行符的个数重新写一遍换行??写个参考给你吧:
<code>$source_content = preg_replace_callback($search, function($matches) { return str_repeat("\n", substr_count($matches[0], "\n"); }, $cource_content); </code>
函数的$matches
参数就是你的$search
匹配得到的结果,如果还是不懂还是看看手册吧,手册上已经写的很全了。
这里是smarty官方给出的答案:
$source_content = preg_replace_callback($search, create_function ('$matches', "return '"
. $this->_quote_replace($this->left_delimiter) . 'php'
. "' . str_repeat(\"\n\", substr_count('\$matches[1]', \"\n\")) .'"
. $this->_quote_replace($this->right_delimiter)
. "';") , $source_content);

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