Publisher review:string in string - php snippet String in string - php snippet
// InStr function // checks for an occurance of a string // within another string function InStr($String,$Find,$CaseSensitive = false) { $i=0; while (strlen($String)>=$i) { unset($substring); if ($CaseSensitive) { $Find=strtolower($Find); $String=strtolower($String); } $substring=substr($String,$i,strlen($Find)); if ($substring==$Find) return true; $i ; } return false; } // A similar function, returns the number of occurances function InStrCount($String,$Find,$CaseSensitive = false) { $i=0; $x=0; while (strlen($String)>=$i) { unset($substring); if ($CaseSensitive) { $Find=strtolower($Find); $String=strtolower($String); } $substring=substr($String,$i,strlen($Find)); if ($substring==$Find) $x ; $i ; } return $x; } // Another similar function, this will return the position of // the string. returns -1 if the string does not exist function InStrPos($String,$Find,$CaseSensitive = false) { $i=0; while (strlen($String)>=$i) { unset($substring); if ($CaseSensitive) { $Find=strtolower($Find); $String=strtolower($String); } $substring=substr($String,$i,strlen($Find)); if ($substring==$Find) return $i; $i ; } return -1; } ?>
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