$re = '/(theColumnName)[\s\S]*[\d]{1,3}/';
$str = 'Line 127: [theColumnName] VARCHAR(10),
Line 155: [theColumnName] VARCHAR(10),
Line 261: INSERT INTO #tempTable(theColumnName)';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php