Ask how to write regular expressions

leoly520

How to write a regular expression with any character in the middle, starting with abc and ending with 456?

leoly520

Start with: ^abc
End with: 456$

Is any character in the middle represented by *? How to write it in combination?

leoly520

There are some discrepancies in the beginning, it should be like this:

How to write a regular expression that starts with abc and ends with 456, with an arbitrary string of indefinite length in the middle?

ljpshr555

example:
$text='abcXXTGFTdfd3245
fzxcv456';

if(preg_match('/^abc.*456$/is',$text)){
  echo'match';
}else{
  echo'does not match';
}

leoly520

What does the /is inside mean?

leoly520

I wrote one myself, following the way upstairs.

$pagecode=@file_get_contents("http://www.baidu.com");

if(preg_match('/^<a onclick.*>$/is',$pagecode)){
  echo'match';
}else{
  echo'does not match';
}

I don't know why it doesn't match.

leoly520

That's it, thanks

Suddenly