Question

i have this file that i want to open, a csv file, and i want to escape the 1st and 4th value for each line of data, a data record represented by $i.

when i say data record i mean each data that is split by a comma i.e.

data1, data2, data3, data4 …. etc.

this is my solution so far:

while (($data = fgetcsv($file_opener, 1000, ",")) !== FALSE) {
          $num = count($data);

              for ($i=0; $i < $num; $i++) {
                // for each 2nd and 3rd value push to array
                 array_push($Ages, $data[$i]);
               // if 1st and fourth value do nothing.
              }

i hope this is not confusing, if you need clarification let me know, and i did check the php docs, i was trying to use the array_chunk and map methods, but i don’t know how to use them in this instance. thanks

Answer 1

Still not sure what you’re trying to achieve, but this script removes each 1st and 4th element from each 4-column group in a record.

<?php
while( false!==($record=getNextRow()) ) {
    foreach($record as $k=>$v) {
        $rpos = $k % 4;
        if ( 0==$rpos || 3==$rpos ) {
            unset($record[$k]);
        }
    }
    echo join(', ', $record), "\n";
}

function getNextRow() {
    // just boilerplate to make it a self-contained example
    // this would be plain fgetcsv in yor case
    static $source = array('1,2,3,4,5,6,7,8', 'a,b,c,d,e,f,g,h,i,j,k,l', 'I,II,III,IV,V,VI,VII,VIII','IX');
    list(,$r) = each($source);
    return $r ? str_getcsv($r) : false;
}

prints

2, 3, 6, 7
b, c, f, g, j, k
II, III, VI, VII