从 php 中的 csv 文件的第 n 行读取

Question

This is my CSV file

1,100003,cs1aa,abc1
2,100004,cs1aa,abc2
3,100008,cs1aa,abc3
4,100009,cs1aa,abc4
5,100010,cs1aa,abc5
6,100011,cs1aa,abc6
7,100012,cs1aa,abc7
8,100013,cs1aa,abc8
9,100014,cs1aa,abc9
10,100015,cs1aa,abc10

Now im using fgetcsv in while loop to read my csv files

 $file = fopen('file.csv', 'r');
 while (($line = fgetcsv($file)) !== FALSE) {
}

Is there a way in php to read this csv file from the nth line of the file?
For eg, if n=5, then the loop should start reading from the 5th line of the file

Answer 1

Just iterate and run fgets as many times as you need to.

<?php
$skip = 5;

$file = fopen('file.csv', 'r');
for($i = 0; $i < $skip && (fgets($tmp) !== false); $i++);
while (($line = fgetcsv($file)) !== FALSE) {
}

fgets reads a single line from the file.

Using fgets means you won't spend any additional time parsing CSV when you don't need to.

Answer 2

$skip = 5; $c = 1; $file = fopen('file.csv', 'r'); while (($line = fgetcsv($file)) !== FALSE) { if( $c++ < $skip ) { continue; } }

Answer 3

This should work as expected

$row = 0;
$start_from = 5; //starts from nth row, 5th row in this case

if (($handle = fopen("test.csv", "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $num = count($data);
        $row++;

        //skip if value less than $start_from row value
        if($row<$start_from){
            continue;
        }
        //else print, you can also do something else with this data
        for ($c=0; $c < $num; $c++) {
            echo $data[$c] . "<br />\n";
        }
    }
    fclose($handle);
}

Explanation

1. Set a starting point
2. Skip the loop for as many rows as you want to skip
3. Keep the data after look, for demo I have used for loop but you can use whatever is your use case.