PHP efficiently reads large files and processes data

<?php

//  Direct use file() Fatal error will be reported   Out of memory ; Such as  $file = file($file);
//  Wrong content   Depending on memory_limit To configure  
// Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 840860368 bytes) in /home/work/*.php on line *

// php bigFileRead.php test.txt

if(!isset($argv[1])){
    echo 'The first parameter is null. =>>> [php bigFileRead.php 1.txt]'.PHP_EOL;die;
}else{
    $file = $argv[1];
    if(!file_exists($file)){
        echo 'file does not exist.'.PHP_EOL;die;
    }
}

function effReadFile($path){
    if($handle = fopen($path, 'r')){
        //  Function to check whether the end of the file has been reached 
        while(!feof($handle)){
            yield trim(fgets($handle));
        }
        fclose($handle);
    }
}
//  Read big papers   Use 
$glob = effReadFile($file);
while ($glob->valid()) {
    //  Current line text 
    $line = $glob->current();
    //  Process data line by line 
    echo $line.PHP_EOL;
    //  Point to next , It can't be less 
    $glob->next();
}