Re: 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@actiu.net> 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 ']'