Remove duplicate words from the string and generate an index string_PHP tutorial

Remove repeated words in the string and generate an index string
//--------------------------------- --------------------
function GetIndexText($okstr,$ilen=-1)
{
if($okstr=="" ) return "";
$ws = explode(" ",$okstr);
$okstr = "";
$wks = "";
foreach($ws as $w)
{
$w = trim($w);
//Exclude characters less than 2
if(strlen($w)<2) continue;
//Exclude numbers or dates
If(!ereg("[^0-9:-]",$w)) continue;
if(strlen($w)==2&&ord($w[0])>0x80) continue ;
if(isset($wks[$w])) $wks[$w]++;
else $wks[$w] = 1;
}
if(is_array($ wks))
{
arsort($wks);
if($ilen==-1)
{ foreach($wks as $w=>$v) $okstr .= $ w." "; }
else
{
foreach($wks as $w=>$v){
if((strlen($okstr)+strlen($w)+1 ; >




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http: //www.bkjia.com/PHPjc/444979.htmlTechArticleRemove repeated words in the string and generate an index string //---------- ---------------------------------------- function GetIndexText($okstr,$ilen=- 1) { if($okstr==) return ; $ws = explod...