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Re: [PHP] Catch line indetation




Sorry for the top post.  In the regex you can use ^\s*[*]  which will catch any white space characters.

On October 28, 2016 8:51:35 AM EDT, Richard <inbound-lists-php@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
>
>> Date: Friday, October 28, 2016 12:09:31 +0100
>> From: Ashley Sheridan <ash@xxxxxxxxxxxxxxxxxxxx>
>> 
>> On 28 October 2016 12:01:16 BST, Narcis Garcia
>> <informatica@xxxxxxxxx> wrote:
>>> Hello, I have a string (I quote here only) as:
>>> 
>>> '   <table>...</table>'
>>> 
>>> As you can see there are 3 spaces at the beginning, but it could
>>> be 0 or
>>> 4 or any number of spaces.
>>> How can I get a string with only the initial spaces part?
>>> 
>>> '   <table>...</table>' -> '   '
>>> 'hello' -> ''
>>> ' hello' -> ' '
>>> 
>>> Thanks.
>> 
>> Have you tried regular expressions? Something like:
>> 
>> ^( )*[^ ]
>> 
>> The first captured match is the number of spaces, from 0 to any
>> amount. Not the space between the brackets and before the closing
>> square bracket
>> 
>
>You need to take into consideration that "whitespace" can be created
>by more than the simple "space" (ascii 32) character. A "[horizontal]
>tab" (ascii 9) is common, but also look at the top of php trim
>function documentation:
>
>  <http://php.net/manual/en/function.trim.php>
>
>to see the characters that it handles as "whitespace". While "trim"
>does the opposite of what you're after, you could likely use the
>ctype_space function to accomplish your need:
>
>  <http://php.net/manual/en/function.ctype-space.php>
>  
>e.g., by iterating through the string until it returns "false". Also,
>"strpos" could be useful.
>
>
>
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