PHP preg_match extract date/time inside <td> and convert into Unix time

Question

In my code I am trying to extract date/time only from <td> and then want to convert it into Unix time-stamp but I am stuck at extracting preg_match_all() function it won't show anything when I use $result[0] or $result[1]. I don't know why but when I dump the array I got following result:

My Array

Array
(
    [0] => Array
        (
            [0] => <td align="left" valign="top">02 April 2017 | 05:55 PM</td>
        )

    [1] => Array
        (
            [0] => 02 April 2017 | 05:55 PM
        )

)

Here is my PHP code

preg_match_all('/<td align="left" valign="top">([^"]*)<\/td>/', $printtable, $result);
var_dump($result);

Answer 1

preg_match_all returns a multidimensional array, not a single element array like preg_match. Your capture group is $result[1][0] (the 1 index is the first capture group, all other indices are additional capture groups). To convert the string to unix time you can use strtotime with str_replace (to get it to a format strtotime can handle, you also could use preg_replace and strip all non alphanumerical/space characters).

echo strtotime(str_replace('|', '', '02 April 2017 | 05:55 PM'));

Demo: https://3v4l.org/MsOlv