PHP-检查数组中的重复项并更新循环中的重复值
给出:PHP-检查数组中的重复项并更新循环中的重复值,php,arrays,regex,Php,Arrays,Regex,给出: $mymarker = '/MARKER[0-9]{2}/'; preg_match_all($mymarker, $mycontent, $matches); var_dump($matches); 如我们所见,MARKER13出现两次。此重复实例可能与MARKER05、MARKER07和MARKER13一起出现 第二个值需要更新为MARKERXX+1,以便 第二次出现: Marker05必须更新为MARKER06 Marker07必须更新为MARKER08 MARKER13必须更新
$mymarker = '/MARKER[0-9]{2}/';
preg_match_all($mymarker, $mycontent, $matches);
var_dump($matches);
如我们所见,MARKER13出现两次。此重复实例可能与MARKER05、MARKER07和MARKER13一起出现
第二个值需要更新为MARKERXX+1,以便
第二次出现:
Marker05必须更新为MARKER06
Marker07必须更新为MARKER08
MARKER13必须更新为MARKER14
我们如何在循环中设置它,以检查DUP并将重复值更新为下一个值
谢谢可能有更简单的方法,但你可以想出以下方法
array(1) {
[0]=>
array(18) {
[0]=>
string(8) "MARKER00"
[1]=>
string(8) "MARKER01"
[2]=>
string(8) "MARKER02"
[3]=>
string(8) "MARKER04"
[4]=>
string(8) "MARKER05"
[5]=>
string(8) "MARKER07"
[6]=>
string(8) "MARKER09"
[7]=>
string(8) "MARKER13"
[8]=>
string(8) "MARKER13"
[9]=>
string(8) "MARKER16"
[10]=>
string(8) "MARKER15"
[11]=>
string(8) "MARKER21"
[12]=>
string(8) "MARKER31"
[13]=>
string(8) "MARKER22"
[14]=>
string(8) "MARKER24"
[15]=>
string(8) "MARKER26"
[16]=>
string(8) "MARKER80"
[17]=>
string(8) "MARKER81"
}
}
谢谢。你的回答给了我一个避免循环部分的想法。MARKERXX是html文档中的位置,我在MARKERXX和下一个MARKERXX上按顺序拆分(XX可以是任意数字,不一定按顺序排列),以映射到db列。标记xx通过预更换获得。因此,由于只有固定(3)个标记可以在整个文件集中重复,我运行了两次preg_replace($patterns,$replacements,1),一次运行05、07、13,下一次运行06、08和14,并在数组中得到了非重复标记xx。:)
<?php
$matches = array("MARKER00","MARKER01","MARKER02","MARKER04","MARKER05","MARKER07","MARKER09","MARKER13","MARKER13","MARKER16","MARKER15","MARKER21","MARKER31","MARKER22","MARKER24","MARKER26","MARKER80","MARKER81");
$duplicates = array("MARKER05", "MARKER07", "MARKER13");
$len = count($matches);
for ($i=0;$i<$len;$i++) {
$marker = $matches[$i];
if (in_array($marker, $duplicates)) {
// one of our markers
// check if the next is the same
// if so update it
if ($i<$len-1) {
if ($marker == $matches[$i+1]) {
# split the string into a letter and a digit part
# with lookarounds (behind/ahead, both positive)
list($text,$number) = preg_split('~(?<=[A-Z])(?=\d)~', $matches[$i+1]);
$number = intval($number);
# increase the intval'd number by one
# and apply it to the original array
$number += 1;
$matches[$i+1] = $text . $number;
}
}
}
}
print_r($matches);
// updated to MARKER14
?>