CODEWITHSUNDEEP
php
lital maatuk
lital maatuk

Reputation: 6239

PHP version causes different behavior of skipping lines for the same code

while($c=fgets(STDIN)){
    if($c===PHP_EOL){
        continue;
    }
    else {
        echo $c;
    }
}

When the above code is called from the command line in php 5.3.8, it prints the rows in the input file, and skips any empty lines. However, in php 5.2.6, it does not skip over the empty lines.

Is there any way of changing the code to make it skip over empty lines in the lder versions as well?

Upvotes: 1

Views: 156

Answers (4)

Shiplu Mokaddim
Shiplu Mokaddim

Reputation: 57650

If you change the condition to 

if(ord($c[0])==0x0a || ord($c[0])==0x0d)

This should work on any platform.

See ord

Upvotes: 1

Vyktor
Vyktor

Reputation: 20997

If you don't need trailing spaces, you can use:

$c = rtrim( $c, "\n\r");
if( $c == ''){
  continue;
}

if you do, you should probably check string length or use this:

if( ($c{0} == "\n") || ($c{0} == "\r")){
  continue;
}

Upvotes: 0

Emir Akaydın
Emir Akaydın

Reputation: 5823

The difference probably caused by php.ini change, not the version. Check auto_detect_line_endings key in your php config file or if you have the access try;

<?php
    ini_set("auto_detect_line_endings", true);
?>

auto_detect_line_endings is used by fgets. PHP_EOL always gets the correct end of line character depending on the OS but fgets may fail if you don't set auto_detect_line_endings to true.

Upvotes: 2

Yevgen
Yevgen

Reputation: 1300

$c = str_replace("\r\n", "", $c);

P.S. I don't think that php version is significant. It seems like something wrong with configuration.

Upvotes: 0

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