为什么我的简单正则表达式不起作用？

Question

I have a list of steps, and they are being echo 'd into the view as li items in a ol .

So, I need to remove leading numbers (that look like ol { list-style: decimal } .

Here is an example array member

1. Combine 1 tbs oil...

I tried this regex

/^\d+\.\s*/

However, it didn't remove the 1. in the example above

But , when I remove the start of line anchor ( ^ ), it works.

Here is the complete code.

foreach($method as &$step) {

    $step = trim(preg_replace('/^\d+\.\s*/', '', $step));
    var_dump($step); // This is what I quoted above
}

What am I doing wrong?

Thanks!

Update

Sorry guys, here is a var_dump() of one of the lines..

string(43) "4. Remove from heat and cover to keep warm."

To me, it doesn't look there is anything before the digit.

Answer 1

is there any whitespace before the digit?

Try

/^\s*\d+\.\s*/

Answer 2

There's probably extra whitespace around. Also you can get ^ to change its behavior with the m modifier:

<?php
$s = <<<EOS
  1. Combine 1 tbs oil...
  2. Hello World
  3. Ok then!
EOS;
echo trim(preg_replace('/^\s*\d+\.\s*/m', '', $s));