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Re: [PHP] Catch line indetation




El 28/10/16 a les 13:09, Ashley Sheridan ha escrit:
> 
> 
> 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
> 
> Ash
> 

preg_replace('^( )*[^ ]', '${1}', '   <table>...</table>')
Warning: preg_replace(): Unknown modifier ']'

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