PHP读取文本文件忽略特定选项卡

I have log file data(.txt) here

As you can see on log file that has Date and Time content.

And now I have PHP function to get the data from log file.

$fromDateTime = new DateTime('Wed, Sep 19  2018 08:00:00');
$toDateTime = new DateTime('Wed, Sep 19  2018 19:59:00');
$file = file_get_contents('Reject.txt');
$lines = explode("
", $file);

// counter
$rowsintimespan = 0;
// keys should correspond to columns
$keys = [
    'Date',
    'Time',
    'Battery level',
    'Piezo sound level',
    'Left (Channel 3) light intensity',
    'Right (Channel 1) light intensity'
];

$values = array_fill(0, count($keys), 0);
$values = array_combine($keys, $values);

// Do Line-By-Line starting by Line 16 (Array Index 15)
for ($i = 11; $i < count($lines); $i++) {
    // if the file is "Tue, Sep 18<tab>2018<tab>23:59:53<tab>"
    $dateobj = DateTime::createFromFormat("???,?M?d??Y?H:i:s+", $lines[$i]);

    // check if date is in your Timespan
    if ($dateobj < $toDateTime && $dateobj > $fromDateTime) {
        $rowsintimespan++; // count if in timespan

        // get line elements
        $lineContent = explode("\t", $lines[$i]);

        // loop through line elements and count them
        $x = 0;
        for ($j = 0; $j < count($keys); $j++) {
            if (!isset($lineContent[$j])) {
                continue;
            }

            // remember position of last not empty column
            if (trim($lineContent[$j]) != '') {
                $x = $j;
            }
        }

        if ($x > 0) {
            $values[$keys[$x]]++;
        }
    }
}

// Debug-Output
echo $rowsintimespan;

// Output every column
echo '<pre>';
print_r($values);

And now I don't want Date and Time including on counting. So I try to remove both, but the result of count is not in the correct keys.

My question, is it possible to ignore both keys then the counting is keep correct?

Above image, I try to removed Date and Time.
The correct one should be, Battery level = 2 and Piezo sound level = 2.

You should subtract the number of columns: $values[$keys[$x]]++; → $values[$keys[$x - 2]]++;

Here is an updated code snippet:

<?php
$fromDateTime = new DateTime('Tue, Nov 13  2018 08:00:00');
$toDateTime = new DateTime('Tue, Nov 13  2018 19:59:00');
$file = file_get_contents('reject_new.txt');
$lines = explode("
", $file);

const IGNORE_COLS = 2;  // +++ Introduced const for number of columns to skip

// counter
$rowsintimespan = 0;
// keys should correspond to columns
$keys = [
    // 'Date',         // +++ 
    // 'Time',         // +++ 
    'Battery level',
    'Piezo sound level',
    'Left (Channel 3) light intensity',
    'Right (Channel 1) light intensity'
];

$values = array_fill(0, count($keys), 0);
$values = array_combine($keys, $values);

// Do Line-By-Line starting by Line 12 (Array Index 11)
for ($i = 11; $i < count($lines); $i++) {
    // if the file is "Tue, Sep 18  2018<tab>23:59:53<tab>"
    $dateobj = DateTime::createFromFormat("???,?M?d??Y?H:i:s+", $lines[$i]);

    // check if date is in your Timespan
    if ($dateobj < $toDateTime && $dateobj > $fromDateTime) {
        $rowsintimespan++; // count if in timespan

        // get line elements
        $lineContent = explode("\t", $lines[$i]);

        // loop through line elements and count them
        for ($j = IGNORE_COLS; $j < count($keys); $j++) {
            if (!isset($lineContent[$j])) {
                continue;
            }

            if (trim($lineContent[$j]) != '') {
                $values[$keys[$j - IGNORE_COLS]]++;   // −−− Remove redundant $x var
            }
        }
    }
}

// Debug-Output
echo $rowsintimespan . PHP_EOL;

// Output every column
echo '<pre>' . PHP_EOL;
print_r($values);