我有如下文字文件：
的text.txt
123 a 234 test a1
123 a 234 test a2
123 a 234 test a3
1h3 b 234 test a4
1d3 c 234 test a5
12g d 234 test a6
v23 e 234 test a7
n23 f 234 test a8
1n3 g 234 test a9
1k3 h 234 test a10
1j3 i 234 test a11
1r3 j 234 test12 a12
1s3 k 234 test34 a13
1w3 l 234 test56 a14
我想通过对重复多次的单词test进行排序来阅读它，所以我想得到如下结果：
test a1
a2
a3
a4
a5
PHP代码：
$PMTA_FILE = file_get_contents("text.txt");
$lineFromText = explode("\n", $PMTA_FILE);
$chart = array();
$row = 0;
$domain = array();
natsort($lineFromText);
$i = 0;
foreach($lineFromText as $line){
if($line !=""){
$data = explode(";",$line);
$domain = $data[3];
if (!array_key_exists($domain, $domains_seen)){
if($row < 5){
echo $domain;
/*In $data[3],it has test 10 times that the same word so I just want to display :
test a1
a2
a3
a4
a5*/
}
$i++;
}
$domains_seen[$domain]==true;
}
}
请帮助我，谢谢。