我有一个大文件，我想修改其中的每一行。我想用PHP快速完成：
我的文件是CSV文件；
20010103,02,00,00,0.9496
20010103,03,00,00,0.9504
20010103,04,00,00,0.9499
我想把它做成这样，以便能够在Highchart:中晚些时候使用
[Date.UTC(2001,01,03,02,00,00),0.9496],
[Date.UTC(2001,01,03,03,00,00),0.9504],
[Date.UTC(2001,01,03,04,00,00),0.9499],
如何循环每一行并进行此修改？
请参阅fgetcsv和fputcsv PHP函数。基本上是这样的：
if (($handle1 = fopen("input.csv", "r")) !== FALSE) {
if (($handle2 = fopen("output.csv", "w")) !== FALSE) {
while (($data = fgetcsv($handle1, 1000, ",")) !== FALSE) {
// Alter your data
$data[0] = '...';
// Write back to CSV format
fputcsv($handle2, $data);
}
fclose($handle2);
}
fclose($handle1);
}
试试这个代码：
<?php
$filename = 'info.csv';
$contents = file($filename);
foreach($contents as $line) {
$data = explode(",",$line);
$val = "[Date.UTC(".substr($data[0],0,4).",".(substr($data[0],4,2)).",".substr($data[0],6,2).",".$data[1].",".$data[2].",".$data[3]."),".$data[4]."],";
}
?>