PHP regex select word that contain specific character from string - php

Question

000001 0001 000000000000001975 00 02 0 000 2017/12/13 14:13:27
i m developing a system with laravel.
this is the string i get from a csv file. i need to select this date and time. into an array. if i can select word that contain : (14:13:27) i can get time and same method to date.

Answer 1

Try this pattern:
/(\d{4}\/[^ ]+) \K([\d:]+)/
Online Demo

Answer 2

A simple solution would be -
$string= "000001 0001 000000000000001975 00 02 0 000 2017/12/13 44:13:27";
preg_match("/([0-9]+):([0-5][0-9]):([0-5][0-9])/", $string, $matches);
echo $matches[0];

Answer 3

I'm still unclear about the OP's exact desired output, but I was more-so underwhelmed by the patterns in the other answers. I'll post this battery of solutions for the betterment of Stackoverflow since I couldn't find a suitable duplicate to close with.
I'm using the tildes ~ as pattern delimiters so that the / characters in the pattern don't need to be escaped. Also, notice I am not calling \K to restart the fullstring match because there is no reason to do so.
Code: (Demo)
$string='000001 0001 000000000000001975 00 02 0 000 2017/12/13 14:13:27';
var_export(preg_match('~\d{4}/\d{2}/\d{2}~',$string,$out)?$out:[]); // date
echo "\n\n";
var_export(preg_match('~\d{2}:\d{2}:\d{2}~',$string,$out)?$out:[]); // time
echo "\n\n";
var_export(preg_match('~\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2}~',$string,$out)?$out:[]); // full datetime
echo "\n\n";
var_export(preg_match('~(\d{4}/\d{2}/\d{2}) (\d{2}:\d{2}:\d{2})~',$string,$out)?$out:[]); // capture date and time
echo "\n\n";
var_export(preg_match_all('~\d{4}/\d{2}/\d{2}|\d{2}:\d{2}:\d{2}~',$string,$out)?$out:[]); // capture date or time
echo "\n\n";
var_export(preg_match('~(\d{4})/(\d{2})/(\d{2}) (\d{2}):(\d{2}):(\d{2})~',$string,$out)?$out:[]); // capture date digits and time digits
Output:
// date
array (
0 => '2017/12/13',
)
// time
array (
0 => '14:13:27',
)
full date time
array (
0 => '2017/12/13 14:13:27',
)
// capture date and time
array (
0 => '2017/12/13 14:13:27',
1 => '2017/12/13',
2 => '14:13:27',
)
// capture date or time
array (
0 =>
array (
0 => '2017/12/13',
1 => '14:13:27',
),
)
// capture date digits and time digits
array (
0 => '2017/12/13 14:13:27',
1 => '2017',
2 => '12',
3 => '13',
4 => '14',
5 => '13',
6 => '27',
)
p.s. For future readers, if you require stronger date validation than this, then regex is probably not the right tool for your task.