PHP regex not working with array string values

i Have the following code, it works with single inputs but fails at compound outputs. The print array function confirms that the array values are correct. I don't know where the problem is.

Single Input:

1:10pm[Sat & Sun Only]

Compound Input:

10:35am, 12:40pm, 1:10pm[Sat & Sun Only]

Code excerpt is below:

function function1($input)
{
    $key1 = ', ';
    if (strpos($input, $key1) !== false) {
        $commas    = substr_count($input, $key1);
        $arraySize = $commas + 1;
        $result1   = explode($key1, $input);
    } else {
        $result1[0] = $input;
    }
    foreach ($result1 as $val) {
        if (preg_match('/^\d{1,2}.\d{2}am\[(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun).Only\]$/', $input)) {
            echo "Match was found <br />";
        } else if (preg_match('/^\d{1,2}.\d{2}pm\[(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun).Only\]$/', $input)) {
            echo "Match was found 2<br />";
        } else if (preg_match('/^\d{1,2}.\d{2}am\[(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun)-(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun).Only\]$/', $input)) {
            echo "Match was found 3<br />";
        } else if (preg_match('/^\d{1,2}.\d{2}pm\[(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun)-(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun).Only\]$/', $input)) {
            echo "Match was found 4<br />";
        } else if (preg_match('/^\d{1,2}.\d{2}am\[(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun) & (?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun).Only\]$/', $input)) {
            echo "Match was found 5<br />";
        } else if (preg_match('/^\d{1,2}.\d{2}pm\[(?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun) & (?:Mon|Tues|Wed|Thurs|Fri|Sat|Sun).Only\]$/', $input)) {
            echo "Match was found 6<br />";
        } else {
            echo 'Not found ';
        }
        //print $val;
    }
    print_r($result1);
}
$imran = '10:35am, 12:40pm, 1:10pm[Sat & Sun Only]';
function1($imran);