php 如何更换ereg？
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How to replace ereg?
提问by Shawn
I'm getting the following message for some php I have to use but did not write:
对于我必须使用但没有写的某些 php，我收到以下消息：
Deprecated: Function ereg() is deprecated in /opt/lampp/htdocs/webEchange/SiteWeb_V5/inc/html2fpdf.php on line 466
This is line 466:
这是第 466 行：
if(ereg('^([^=]*)=["\']?([^"\']*)["\']?$',$v,$a3))
I tried simply replacing with preg_match, but it couldn't recognize the = modifier in the regular expression.. I'm not too good with regular expression yet and solving this requires that I learn the regexp ereg needs AND the regexp preg_match needs (which, if I am not mistaken, is different)... Could you guys help me out with this one?
我尝试简单地用 preg_match 替换，但它无法识别正则表达式中的 = 修饰符。 ，如果我没记错的话，是不同的）...你们能帮我解决这个问题吗？
Thanks
谢谢
采纳答案by Gumbo
POSIX extended regular expressions(POSIX ERE, used by ereg) and Perl-combatible regular expressions(PCRE, used by preg_match) are very similar. Except from some special POSIX expressions, PCRE is a superset of POSIX ERE.
POSIX 扩展正则表达式（POSIX ERE，由 使用ereg）和Perl 兼容的正则表达式（PCRE，由 使用preg_match）非常相似。除了一些特殊的 POSIX 表达式，PCRE 是 POSIX ERE 的超集。
That means you just need to put your POSIX ERE regular expressions into delimiters(here /) and escape any occurrence of that character inside the regular expression and you have a valid PCRE regular expression:
这意味着您只需要将 POSIX ERE 正则表达式放入分隔符（此处/）并在正则表达式中转义该字符的任何出现，并且您有一个有效的 PCRE 正则表达式：
/^([^=]*)=["']?([^"']*)["']?$/
So:
所以：
preg_match('/^([^=]*)=["\']?([^"\']*)["\']?$/', $v, $a3)
回答by codaddict
Try:
尝试：
if(preg_match('~^([^=]*)=["\']?([^"\']*)["\']?$~',$v,$a3))
The regex in preg_match needs to be enclosed between a pair of delimiters, which is not the case with the deprecated ereg() function.
preg_match 中的正则表达式需要包含在一对分隔符之间，但已弃用的 ereg() 函数则不是这种情况。
回答by Bart Kiers
the preg_family expects the regex to be delimited. Instead of:
该preg_家庭希望的正则表达式来分隔。代替：
'^([^=]*)=["\']?([^"\']*)["\']?$'
try:
尝试：
'/^([^=]*)=["\']?([^"\']*)["\']?$/'
