Shoutbox avec ajax

GEThttp://127.0.0.1/shout/w.php?m=User&n= test
[HTTP/1.0 500 Internal Server Error 1ms]

apache2 -v  
Server version: Apache/2.4.52 (Debian)
Server built:   2021-12-20T17:42:09

PHP 8.1.2 (cli) (built: Jan 27 2022 01:00:14) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.2, Copyright (c), by Zend Technologies

apachectl -M
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message
Loaded Modules:
 core_module (static)
 so_module (static)
 watchdog_module (static)
 http_module (static)
 log_config_module (static)
 logio_module (static)
 version_module (static)
 unixd_module (static)
 access_compat_module (shared)
 alias_module (shared)
 auth_basic_module (shared)
 authn_core_module (shared)
 authn_file_module (shared)
 authz_core_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 deflate_module (shared)
 dir_module (shared)
 env_module (shared)
 filter_module (shared)
 mime_module (shared)
 mpm_prefork_module (shared)
 negotiation_module (shared)
 php_module (shared)
 reqtimeout_module (shared)
 setenvif_module (shared)
 status_module (shared)

apache2 -v
Server version: Apache/2.4.52
Server built:   2022-01-03T21:27:14

PHP 7.4.25 (cli) (built: Oct 23 2021 21:53:50) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.25, Copyright (c), by Zend Technologies

apachectl -M
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message
Loaded Modules:
 core_module (static)
 so_module (static)
 watchdog_module (static)
 http_module (static)
 log_config_module (static)
 logio_module (static)
 version_module (static)
 unixd_module (static)
 access_compat_module (shared)
 alias_module (shared)
 auth_basic_module (shared)
 authn_core_module (shared)
 authn_file_module (shared)
 authz_core_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 deflate_module (shared)
 dir_module (shared)
 env_module (shared)
 filter_module (shared)
 mime_module (shared)
 mpm_prefork_module (shared)
 negotiation_module (shared)
 php7_module (shared)
 reqtimeout_module (shared)
 setenvif_module (shared)
 status_module (shared)

php -i | grep error_log

[Thu Feb 17 15:58:35.828722 2022] [php:error] [pid 2049] [client 127.0.0.1:54930] PHP Fatal error:  Uncaught ValueError: fread(): Argument #2 ($length) must be greater than 0 in /var/www/shout/w.php:68\nStack trace:\n#0 /var/www/shout/w.php(68): fread()\n#1 {main}\n  thrown in /var/www/shout/w.php on line 68, referer: http://127.0.0.1/shout/tchat.php

$chattext = fread($handle, filesize($fn)); fclose($handle);

<?php
    /**

     
 Author: chris at linuxuser.at     * Licence: MIT     */    $fn = "chat.txt";    $maxlines = 1000;    $nick_maxlength = 10;    /* Set this to a minimum wait time between posts (in sec) */    $waittime_sec = 0;    /* spam keywords */    $spam[] = "cum";    $spam[] = "dick";    $spam[] = "EAT coon";    /* IP's to block */    $blockip[] = "72.60.167.89";    /* spam, if message IS exactly that string */    $espam[] = "ajax";    $msg = $_REQUEST["m"];    $n = $_REQUEST["n"];     if ($waittime_sec > 0) {        $lastvisit = $_COOKIE["lachatlv"];        setcookie("lachatlv", time());        if ($lastvisit != "") {            $diff = time() - $lastvisit;            if ($diff < $waittime_sec) { die(); }        }    }    if ($msg != "") {        if (strlen($msg) < 2) { die(); }        if (strlen($msg) > 3) {            /* Smilies are ok */            if (strtoupper($msg) == $msg) { die(); }        }        if (strlen($msg) > 150) { die(); }        if (strlen($msg) > 15) {            if (substr_count($msg, substr($msg, 6, 8)) > 1) { die(); }        }        foreach ($blockip as $a) {            if ($_SERVER["REMOTE_ADDR"] == $a) { die(); }        }        $mystring = strtoupper($msg);        foreach ($spam as $a) {             if (strpos($mystring, strtoupper($a)) === false) {                 /* Everything Ok Here */             } else {                 die();             }        }        foreach ($espam as $a) {            if (strtoupper($msg) == strtoupper($a)) { die(); }        }        $handle = fopen ($fn, 'r');        $chattext = fread($handle, filesize($fn)); fclose($handle);        $arr1 = explode("\n", $chattext);        if (count($arr1) > $maxlines) {            /* Pruning */            $arr1 = array_reverse($arr1);            for ($i=0; $i<$maxlines; $i++) { $arr2[$i] = $arr1[$i]; }            $arr2 = array_reverse($arr2);        } else {            $arr2 = $arr1;        }        $chattext = implode("\n", $arr2);        // Last spam filter: die if message has already been in the chat history        if (substr_count($chattext, $msg) > 2) { die(); }        $spaces = "";        if (strlen($n) > $nick_maxlength-1) $n = substr($n, 0, $nick_maxlength-1);        for ($i=0; $i<($nick_maxlength - strlen($n)); $i++) $spaces .= " ";        $out = $chattext . $n . $spaces . "| " . $msg . "\n";        $out = str_replace("\'", "'", $out);        $out = str_replace("\\\"", "\"", $out);        $handle = fopen ($fn, 'w'); fwrite($handle, $out.trim()); fclose($handle);        $input = fopen($file, 'r');  }      ?>

PHP Fatal error:  Uncaught ValueError: fread(): Argument #2 ($length) must be greater than 0 

<?php
    /**
     * Author: chris at linuxuser.at
     * Licence: MIT
     */
    $fn = "chat.txt";
    $maxlines = 1000;

    $nick_maxlength = 10;

    /* Set this to a minimum wait time between posts (in sec) */
    $waittime_sec = 0;

    /* spam keywords */
    $spam[] = "cum";
    $spam[] = "dick";
    $spam[] = "EAT coon";

    /* IP's to block */
    $blockip[] = "72.60.167.89";

    /* spam, if message IS exactly that string */
    $espam[] = "ajax";

    $msg = $_REQUEST["m"];
    $n = $_REQUEST["n"];
 

    if ($waittime_sec > 0) {
        $lastvisit = $_COOKIE["lachatlv"];
        setcookie("lachatlv", time());

        if ($lastvisit != "") {
            $diff = time() - $lastvisit;
            if ($diff < $waittime_sec) { die(); }
        }
    }

    if ($msg != "") {
        if (strlen($msg) < 2) { die(); }
        if (strlen($msg) > 3) {
            /* Smilies are ok */
            if (strtoupper($msg) == $msg) { die(); }
        }
        if (strlen($msg) > 150) { die(); }
        if (strlen($msg) > 15) {
            if (substr_count($msg, substr($msg, 6, 8)) > 1) { die(); }
        }

        foreach ($blockip as $a) {
            if ($_SERVER["REMOTE_ADDR"] == $a) { die(); }
        }

        $mystring = strtoupper($msg);
        foreach ($spam as $a) {
             if (strpos($mystring, strtoupper($a)) === false) {
                 /* Everything Ok Here */
             } else {
                 die();
             }
        }

        foreach ($espam as $a) {
            if (strtoupper($msg) == strtoupper($a)) { die(); }
        }

        $handle = fopen ($fn, 'r');
        $chattext = fread($handle, filesize($fn)); fclose($handle);

        $arr1 = explode("\n", $chattext);

        if (count($arr1) > $maxlines) {
            /* Pruning */
            $arr1 = array_reverse($arr1);
            for ($i=0; $i<$maxlines; $i++) { $arr2[$i] = $arr1[$i]; }
            $arr2 = array_reverse($arr2);
        } else {
            $arr2 = $arr1;
        }

        $chattext = implode("\n", $arr2);


        // Last spam filter: die if message has already been in the chat history
        if (substr_count($chattext, $msg) > 2) { die(); }

        $spaces = "";
        if (strlen($n) > $nick_maxlength-1) $n = substr($n, 0, $nick_maxlength-1);
        for ($i=0; $i<($nick_maxlength - strlen($n)); $i++) $spaces .= " ";

        $out = $chattext . $n . $spaces . "| " . $msg . "\n";
        $out = str_replace("\'", "'", $out);
        $out = str_replace("\\\"", "\"", $out);
        $handle = fopen ($fn, 'w'); fwrite($handle, $out.trim()); fclose($handle);
        $input = fopen($file, 'r');
  }      
?>/code>


Et la ligne 68 qui pose problème:

<code php>$chattext = fread($handle, filesize($fn)); fclose($handle);

oot@debian:/var/www/shout# ls -l
total 76
-rwxrw-r-- 1 root www-data    17 17 févr. 11:14 chat.txt
-rw-r--r-- 1 root www-data  5680 28 nov.  16:51 tchat.php
-rw-r--r-- 1 root www-data  2657 28 nov.  16:51 w.php

$ php -r "echo fread(fopen('emptyfile.txt', 'r'), filesize('emptyfile.txt')); echo 'done';"

Warning: fread(): Length parameter must be greater than 0 in Command line code on line 1
done

$ php -r "echo fread(fopen('emptyfile.txt', 'r'), filesize('emptyfile.txt')); echo 'done';"

Fatal error: Uncaught ValueError: fread(): Argument #2 ($length) must be greater than 0 in Command line code:1
Stack trace: [...]

<?php

$fn = 'chat.txt';

// ...

$chattext = '';

if (is_readable($fn)) {
    $chattext = file_get_contents($fn);
}

Thu Feb 17 21:48:35.661918 2022] [php:error] [pid 11450] [client 127.0.0.1:55010] PHP Fatal error:  Uncaught ArgumentCountError: trim() expects at least 1 argument, 0 given in /var/www/shout/w.php:97\nStack trace:\n#0 /var/www/shout/w.php(97): trim()\n#1 {main}\n  thrown in /var/www/shout/w.php on line 97, referer: http://127.0.0.1/shout/tchat.php

$handle = fopen ($fn, 'w'); fwrite($handle, $out.trim()); fclose($handle);

<?php

$out = '    mon super message    ';

echo '[' . $out . ']'; // affiche [    mon super message    ]
echo '[' . trim($out) . ']'; // affiche [mon super message]

<?php

$out = '    mon super message    ';

echo '[' . $out . trim() . ']'; // affiche [    mon super message    ] (warning ou fatal error)

$handle = fopen ($fn, 'w'); fwrite($handle, trim($out)); fclose($handle);
// ou avec file_put_contents
file_put_contents($fn, trim($out));

 | Bonjour       | Bonjour toi ça va ?

$out = $chattext . $n . $spaces . "| " . $msg . "\n";

<?php
    /**
     * Author: chris at linuxuser.at
     * Licence: MIT
     */
    $fn = "chat.txt";
    $maxlines = 1000;

    $nick_maxlength = 10;

    /* Set this to a minimum wait time between posts (in sec) */
    $waittime_sec = 0;

    /* spam keywords */
    $spam[] = "cum";
    $spam[] = "dick";
    $spam[] = "EAT coon";

    /* IP's to block */
    $blockip[] = "72.60.167.89";

    /* spam, if message IS exactly that string */
    $espam[] = "ajax";

    $msg = $_REQUEST["m"];
    $n = $_REQUEST["n"];
 

    if ($waittime_sec > 0) {
        $lastvisit = $_COOKIE["lachatlv"];
        setcookie("lachatlv", time());

        if ($lastvisit != "") {
            $diff = time() - $lastvisit;
            if ($diff < $waittime_sec) { die(); }
        }
    }

    if ($msg != "") {
        if (strlen($msg) < 2) { die(); }
        if (strlen($msg) > 3) {
            /* Smilies are ok */
            if (strtoupper($msg) == $msg) { die(); }
        }
        if (strlen($msg) > 150) { die(); }
        if (strlen($msg) > 15) {
            if (substr_count($msg, substr($msg, 6, 8)) > 1) { die(); }
        }

        foreach ($blockip as $a) {
            if ($_SERVER["REMOTE_ADDR"] == $a) { die(); }
        }

        $mystring = strtoupper($msg);
        foreach ($spam as $a) {
             if (strpos($mystring, strtoupper($a)) === false) {
                 /* Everything Ok Here */
             } else {
                 die();
             }
        }

        foreach ($espam as $a) {
            if (strtoupper($msg) == strtoupper($a)) { die(); }
        }

        $handle = fopen ($fn, 'r');
        $chattext = '';
       if (is_readable($fn)) {
    $chattext = file_get_contents($fn);
}

        $arr1 = explode("\n", $chattext);

        if (count($arr1) > $maxlines) {
            /* Pruning */
            $arr1 = array_reverse($arr1);
            for ($i=0; $i<$maxlines; $i++) { $arr2[$i] = $arr1[$i]; }
            $arr2 = array_reverse($arr2);
        } else {
            $arr2 = $arr1;
        }

        $chattext = implode("\n", $arr2);


        // Last spam filter: die if message has already been in the chat history
        if (substr_count($chattext, $msg) > 2) { die(); }

        $spaces = "";
        if (strlen($n) > $nick_maxlength-1) $n = substr($n, 0, $nick_maxlength-1);
        for ($i=0; $i<($nick_maxlength - strlen($n)); $i++) $spaces .= " ";

        $out = $chattext . $n . $spaces . "| " . $msg . "\n";
        $out = str_replace("\'", "'", $out);
        $out = str_replace("\\\"", "\"", $out);
        $handle = fopen ($fn, 'w'); fwrite($handle, trim($out)); fclose($handle);
        $input = fopen($file, 'r');
  }      
?>

        $out = $chattext . $n . $spaces . "| " . $msg;
        $out = str_replace("\'", "'", $out);
        $out = str_replace("\\\"", "\"", $out);
        
        file_put_contents($fn, trim($out) . "\n");

        $out = $chattext . $n . $spaces . "| " . trim($msg) . "\n";
        $out = str_replace("\'", "'", $out);
        $out = str_replace("\\\"", "\"", $out);
        
        file_put_contents($fn, $out);