Step by Step solution about How to resolve the algorithm Read a file line by line step by step in the PHP programming language

The first code snippet opens the current file in read mode and iterates through each line in the file. It then removes any trailing whitespace from the line and prints the reversed line to the output.

The second code snippet opens a file called "test.txt" in read mode and iterates through each line in the file. It then removes any trailing whitespace from the line and prints the line to the output if it is not null.

This code is useful for reading files line by line from the command line, and can be used for a variety of purposes, such as processing log files or generating reports.

<?php
$file = fopen(__FILE__, 'r'); // read current file
while ($line = fgets($file)) {
    $line = rtrim($line);      // removes linebreaks and spaces at end
    echo strrev($line) . "\n"; // reverse line and upload it
}


<?php // HOW TO ECHO FILE LINE BY LINE FROM THE COMMAND LINE: php5-cli
$file = fopen('test.txt', 'r'); // OPEN FILE WITH READ ACCESS
while (!feof($file)) { 
    $line = rtrim(fgets($file)); // REMOVE TRAILING WHITESPACE AND GET LINE
    if($line != NULL) echo("$line\n"); // IF THE LINE ISN'T NULL, ECHO THE LINE
}