Removing letters from a string using Regular Expressions.
Very simple. but brain bending – All I wanted to do was remove a prefix from a string.
The prefix was always letters, and I only wanted the numerical suffix returned, so though, preg_replace was my best bet.
echo preg_replace("/[a-zA-Z]*/", '', '12345MystrING67890');
This returns :
1234567890
Perfect.