Question

How can I find a 3 character text pattern in a string of:
an upper or lowercase alphabetic character (a to z or A to Z) followed by
a numeric character (0 to 9) followed by
an upper or lowercase alphabetic character (a to z or A to Z)

for example x4A or A3j or A7X or h1k

Answer 1

$matches = array();
preg_match('/[a-z]\d[a-z]/i', $my_string, $matches);
// now $matches contains all you want