PHP:在特定值相等时对csv行进行分组
我不认为这很难,但经过一天的辛苦工作,我无法解决这个琐碎的问题。 我有一个简单的csv文件,必须通过php显示,根据列的值对行进行分组。 我们特别指出: 这是我的CSV文件:PHP:在特定值相等时对csv行进行分组,php,arrays,csv,foreach,feof,Php,Arrays,Csv,Foreach,Feof,我不认为这很难,但经过一天的辛苦工作,我无法解决这个琐碎的问题。 我有一个简单的csv文件,必须通过php显示,根据列的值对行进行分组。 我们特别指出: 这是我的CSV文件: 15000,art1,black 15000,art1,white 15000,art1,green 20000,art2,black 20000,art2,white 25000,art3,black 这就是我想打印的内容: 15000-art1-black 15000-art1-white 15000-art1-gr
15000,art1,black
15000,art1,white
15000,art1,green
20000,art2,black
20000,art2,white
25000,art3,black
这就是我想打印的内容:
15000-art1-black
15000-art1-white
15000-art1-green
--- Found black,white,green ---
20000-art2-black
20000-art2-white
--- Found balck,white ---
25000-art3-black
--- Found black ---
我的出发点是:
<?php
$Export= fopen("Test.csv", "r");
while(!feof ($Export)){
$riga=fgets($Export, 4096);
if($riga!=""){
$data=split(',',$riga);
foreach ($data as $line) {
$val = explode(",", $line);
$code = $val[0];
$art_n = $val[1];
$color = $val[2];
}
}
}
fclose($Export);
?>
这是php代码的一个修改版本,可以满足您的需要:
<?php
$Export= fopen("Test.csv", "r");
$found=array();
$lastart="";
while(!feof ($Export)){
$riga=fgets($Export, 4096);
$riga = str_replace(PHP_EOL, '', $riga);
if($riga!=""){
$val = explode(",", $riga);
$code = $val[0];
$art_n = $val[1];
if ( $lastart != $art_n && $lastart != "") {
foreach ( $found as $col ) {
@$colorfound.=$col.",";
}
$colorfound = rtrim($colorfound, ",");
echo "--- Found $colorfound ---\n";
unset ($found);
$colorfound = "";
}
$color = $val[2];
$found[] = $color;
echo "$code-$art_n-$color\n";
$lastart = $art_n;
}
}
//The last art_n
foreach ( $found as $col ) {
@$colorfound.=$col.",";
}
$colorfound = rtrim($colorfound, ",");
echo "--- Found $colorfound ---\n";
fclose($Export);
?>
将整个源代码放入。您需要首先将每一个换行符放入一个数组中,然后分解逗号,然后将其替换为-并最终计算要显示的出现次数-正确找到。您能给我一个例子吗?
<?php
if (($handle = fopen("Test.csv", "r"))) {
$lines = array();
while (($columns = fgetcsv($handle))) {
$number = $columns[0];
$colour = $columns[2];
if (!isset($lines[$number])) {
$lines[$number] = array('instances' => array(), 'colours' => array());
}
$lines[$number]['instances'][] = $columns;
$lines[$number]['colours'][$colour] = 1;
}
fclose($handle);
foreach ($lines as $number => $line) {
foreach ($line['instances'] as $instance) {
echo implode('-', $instance) . "\n";
}
echo "--- Found " . implode(',', array_keys($line['colours'])) . " ---\n";
}
}
15000-art1-black
15000-art1-white
15000-art1-green
--- Found black,white,green ---
20000-art2-black
20000-art2-white
--- Found black,white ---
25000-art3-black
--- Found black ---