我有以下列表：
1945年1月05日BA 87 34 1 59 50
1945/01/05 CA 18 17 45 49 82
1945年1月13日BA 6 66 1 16 48
1945/01/13 CA 40 60 32 50 80
等等…
我想把它们排列成一个数组，如下所示：
$array['BA'][0][0] = 87;
$array['BA'][0][1] = 34;
$array['BA'][0][2] = 1;
$array['BA'][0][3] = 59;
$array['BA'][0][4] = 50;
$array['CA'][0][0] = 18;
$array['CA'][0][1] = 17;
$array['CA'][0][2] = 45;
$array['CA'][0][3] = 49;
$array['CA'][0][4] = 82;
$array['BA'][1][0] = 6;
$array['BA'][1][1] = 66;
$array['BA'][1][2] = 1;
$array['BA'][1][3] = 16;
$array['BA'][1][4] = 48;
$array['CA'][1][0] = 48;
$array['CA'][1][1] = 60;
$array['CA'][1][2] = 32;
$array['CA'][1][3] = 50;
$array['CA'][1][4] = 80;
我知道我可以使用preg_split（'/''s+/'，$list）；创建阵列，但如何从该列表中创建三维阵列？
感谢您的帮助
试试这样的东西：
更新了代码，以便您也可以加载文件，因为您有内存问题。考虑一下：如果加载的数据量已经造成内存问题，那么最终的结果，数组，也可能产生内存问题！因为这是更多的数据！
因此，这将按行读取，因此不会直接将整个文件加载到内存中。但是，由于内存问题，您可能不应该写入数组，而应该写入数据库。否则，内存问题将不断出现。
<?PHP
/*
* Example when small amount of data is in a string
*/
/*
//your input
$str='1945/01/05 BA 87 34 1 59 50
1945/01/05 CA 18 17 45 49 82
1945/01/13 BA 6 66 1 16 48
1945/01/13 CA 40 60 32 50 80';
//we work per line
$lines=explode("'n", $str);
//loop each line
foreach($lines AS $line) {
*/
/*
* Example when big amount of data is in a file
*/
//this will contain the end result
$result=array();
$filename='lines.txt'; //contains the data like in your question
$fp = fopen($filename,'r');
while($line=fgets($fp)) {
//explode each line on space so we get the different fields
$fields=explode(' ', $line);
//we remove the date, not needed
unset($fields[0]);
//we get the key (BA/CA/etc) and remove it also
$key=$fields[1];
unset($fields[1]);
//we write the result to the array
//using array_values so the indexes are from 0-4 again
//because we removed items
$result[$key][]=array_values($fields);
}
fclose($fp);
//show the result in html
echo '<pre>';
print_r($result);
这个问题改变了
这确实回答了评论中提出的问题，而不是实际问题。
<?PHP
/*
* Example when big amount of data is in a file
*/
//this will contain the end result
$result=array();
$filename='lines.txt'; //contains the data like in your question
$fp = fopen($filename,'r');
while($line=fgets($fp)) {
//explode each line on space so we get the different fields
$fields=explode(' ', $line);
//we remove the date, not needed
unset($fields[0]);
//we get the key (BA/CA/etc) and remove it also
$key=$fields[1];
unset($fields[1]);
//We start counting the numbers
foreach($fields AS $nr) {
$nr=trim($nr);
if(empty($result[$key][$nr])) {
$result[$key][$nr]=1;
}else{
$result[$key][$nr]++;
}
}
}
fclose($fp);
//show the result in html
echo '<pre>';
print_r($result);
<?php
$a = '1945/01/05 BA 87 34 1 59 50
1945/01/05 CA 18 17 45 49 82
1945/01/13 BA 6 66 1 16 48
1945/01/13 CA 40 60 32 50 80';
$array = array();
$list = explode("'n", $a);
echo '<pre>';
print_r($list);
echo '</pre>';
$first_index = 0;
$counter = 0;
foreach($list as $key=>$value) {
if($counter >=2) {
$first_index++;
$counter= 0;
}
$row = explode(" ",$value);
$k = $row[1];
for($i=2; $i< count($row); $i++) {
$array[$k][$first_index][] = $row[$i];
}
$counter++;
}
echo '<pre>';
print_r($array);
echo '</pre>';
?>