regex: find one-digit number

Question

I need to find the text of all the one-digit number.

My code:

$string = \'text 4 78 text 558 my.name@gmail.com 5 text 78998 text\';
$pattern = \'/ [\         


        

Answer 1

Use word boundaries. Note that the range quantifier {1} (a single \d will only match one digit) and the character class [] is redundant because it only consists of one character.

\b\d\b