I've seen that, for some rare strings, neither of those work as
expected. Finally I've choosen the "procedural" method (more clear and
secure to work):
$s = ' <table>...</table>';
$indentation = mb_substr($s, 0, mb_strlen($s) - mb_strlen(ltrim($s)));
Thanks to everyone for the ideas and help.
El 29/10/16 a les 16:02, Narcis Garcia ha escrit:
> Those two expressions are the only that work:
>
> preg_replace('/^(\s*)\S*/','${1}',' <table>...</table>')
> preg_filter('/^(\s*)\S*/','${1}',' <table>...</table>')
>
> Which one of those functions is the best to be used for this case?
>
>
> El 29/10/16 a les 07:52, richard gray ha escrit:
>> On 28/10/2016 14:15, Christoph M. Becker wrote:
>>>
>>> Shouldn't that be
>>>
>>> ^( *)[^ ]
>>>
>>> instead?
>>>
>> or maybe even ..?
>>
>> ^(\s*)
>>
>> Rich
>>
>
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