: PHP software to detect spam? Possible Duplicate: How can I prevent spam on sites which I control? I'm looking for something like spam-assassin or similar, except it only focuses

@Debbie626

You can create your own spam filter classes and use it.

I use following class to detect spam on comments:

class CommonFunctions{

private $spam_array = array('.com','.net','.org','.biz','.coop','.info','.museum','.name','.pro'
,'.edu','.gov','.int','.mil','.ac','.ad','.ae','.af','.ag','.ai','.al',
'.am','.an','.ao','.aq','.ar','.as','.at','.au','.aw','.az','.ba','.bb',
'.bd','.be','.bf','.bg','.bh','.bi','.bj','.bm','.bn','.bo','.br','.bs',
'.bt','.bv','.bw','.by','.bz','.ca','.cc','.cd','.cf','.cg','.ch','.ci',
'.ck','.cl','.cm','.cn','.co','.cr','.cu','.cv','.cx','.cy','.cz','.de',
'.dj','.dk','.dm','.do','.dz','.ec','.ee','.eg','.eh','.er','.es','.et',
'.fi','.fj','.fk','.fm','.fo','.fr','.ga','.gd','.ge','.gf','.gg','.gh',
'.gi','.gl','.gm','.gn','.gp','.gq','.gr','.gs','.gt','.gu','.gv','.gy',
'.hk','.hm','.hn','.hr','.ht','.hu','.id','.ie','.il','.im','.in','.io',
'.iq','.ir','.is','.it','.je','.jm','.jo','.jp','.ke','.kg','.kh','.ki',
'.km','.kn','.kp','.kr','.kw','.ky','.kz','.la','.lb','.lc','.li','.lk',
'.lr','.ls','.lt','.lu','.lv','.ly','.ma','.mc','.md','.mg','.mh','.mk',
'.ml','.mm','.mn','.mo','.mp','.mq','.mr','.ms','.mt','.mu','.mv','.mw',
'.mx','.my','.mz','.na','.nc','.ne','.nf','.ng','.ni','.nl','.no','.np',
'.nr','.nu','.nz','.om','.pa','.pe','.pf','.pg','.ph','.pk','.pl','.pm',
'.pn','.pr','.ps','.pt','.pw','.py','.qa','.re','.ro','.rw','.ru','.sa',
'.sb','.sc','.sd','.se','.sg','.sh','.si','.sj','.sk','.sl','.sm','.sn',
'.so','.sr','.st','.sv','.sy','.sz','.tc','.td','.tf','.tg','.th','.tj',
'.tk','.tm','.tn','.to','.tp','.tr','.tt','.tv','.tw','.tz','.ua','.ug',
'.uk','.um','.us','.uy','.uz','.va','.vc','.ve','.vg','.vi','.vn','.vu',
'.ws','.wf','.ye','.yt','.yu','.za','.zm','.zw');







/*
*find whether a string contains html
*@param string
*@return boolean
*/
public function containHtml($data){

if(strlen($data) != strlen(strip_tags($data))){
return true;
}

return false;

}
//function end

public function isOK($data){
if(strlen(trim($data))>0){
if(!$this->containHtml($data)){
if(!$this->containSpam($data)){
return true;
}
}
}
return false;
}
/*
*find whether a string contains spam
*@param string
*@return boolean
*/
public function containSpam($data){
$data=strtolower($data);
foreach($this->spam_array as $spam_word){
//echo "<br>Data is $data Word is $spam_word ".stripos($data,$spam_word)."<br/>";

if($this->cusFnmatch("*$spam_word*",$data)){
return true;
}

}

return false;

}
//function end


function cusFnmatch($needl,$check_string){

if (!function_exists('fnmatch')) {
define('FNM_PATHNAME', 1);
define('FNM_NOESCAPE', 2);
define('FNM_PERIOD', 4);
define('FNM_CASEFOLD', 16);

function fnmatch($pattern, $string, $flags = 0) {
return pcre_fnmatch($pattern, $string, $flags);
}
}

if(!function_exists('pcre_fnmatch')){

function pcre_fnmatch($pattern, $string, $flags = 0) {
$modifiers = null;
$transforms = array(
'*' => '.*',
'?' => '.',
'[!' => '[^',
'[' => '[',
']' => ']',
'.' => '.',
'' => '\'
);

// Forward slash in string must be in pattern:
if ($flags & FNM_PATHNAME) {
$transforms['*'] = '[^/]*';
}

// Back slash should not be escaped:
if ($flags & FNM_NOESCAPE) {
unset($transforms['']);
}

// Perform case insensitive match:
if ($flags & FNM_CASEFOLD) {
$modifiers .= 'i';
}

// Period at start must be the same as pattern:
if ($flags & FNM_PERIOD) {
if (strpos($string, '.') === 0 && strpos($pattern, '.') !== 0) return false;
}

$pattern = '#^'
. strtr(preg_quote($pattern, '#'), $transforms)
. '$#'
. $modifiers;

return (boolean)preg_match($pattern, $string);
}
}
return fnmatch($needl,$check_string);
}

}


and i'll check for spam like this,

include_once "class.commonfunctions.php";

$cmn=new CommonFunctions();
if(!$cmn->isOK($comment))
{
return false;
}
else{

//proceed with insert

}

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@Sarah324

Have you considered Akismet? It's excellent at catching spam.

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