Kubadilisha Tabia ya preg_match_all katika PHP
Kwa kutumia parameta ya nne ya funkta preg_match_all
unaweza kubadilisha njia ya kikundi za kikomo.
Tuangalie, thamani gani parameta hii inaweza kuchukua:
| Parameta | Maelezo |
|---|---|
PREG_PATTERN_ORDER |
Hali ya chaguo-msingi. Matokeo yamegawanywa kwa kikomo - kipengele cha sifuri cha safu kina kikomo cha sifuri, kipengele cha kwanza cha safu kina kikomo cha kwanza na kadhalika. |
PREG_SET_ORDER |
Matokeo yamegawanywa kwa mechi - kila kipengele cha safu kina safu yenye kikomo zilizopatikana. |
Sasa tuangalie matumizi ya parameta hii kwa mifano:
Mfano
Tuondoe alama zote za wakati kutoka kwenye mstari na vipengele vyake:
<?php
$time = '12:01:02 13:03:04 14:05:06';
preg_match_all('#(\d\d):(\d\d):(\d\d)#', $time, $res);
print_r($res);
?>
Matokeo ya kutekeleza kificho:
[
0 => ['12:01:02', '13:03:04', '14:05:06'],
1 => ['12', '13', '14'],
2 => ['01', '03', '05'],
3 => ['02', '04', '06']
]
Mfano
Sasa tumia bendera PREG_SET_ORDER
kwa kikundi kwa mechi:
<?php
$time = '12:01:02 13:03:04 14:05:06';
preg_match_all('#(\d\d):(\d\d):(\d\d)#', $time, $res, PREG_SET_ORDER);
print_r($res);
?>
Matokeo ya kutekeleza kificho:
[
0 => '12:01:02',
1 => '12',
2 => '01',
3 => '02'
],
[
0 => '13:03:04',
1 => '13',
2 => '03',
3 => '04'
],
[
0 => '14:05:06',
1 => '14',
2 => '05',
3 => '06'
]
Kazi za Vitendo
Kuna mstari wenye tarehe:
<?php
$str = '2023-10-29 2024-11-30 2025-12-31';
?>
Tafuta tarehe zote, ukitenga mwaka, mwezi na siku katika kikomo tofauti. Fanya ili kikundi cha kwanza kiingie tarehe ya kwanza na kikomo chake, kikundi cha pili - cha pili na kikomo chake na kadhalika.
