Call function in same class

PHP
1

I have the following:


public function update($table, $data, $wheredata)
    {
        ksort($data);

        $fieldDetails = NULL;
		$whereDetails = NULL;
        foreach($data as $key=> $value) {
            $fieldDetails .= "`$key`=:$key,";
        }
		$fieldDetails = rtrim($fieldDetails, ',');
		
		$wcnt = count($wheredata);
		echo "===".$wcnt."===";
		$arrcount = $wcnt - 1;
		$kount = -1;
		foreach($wheredata as $keyw=> $valuew) {
            $kount = $kount + 1;
			if ($kount < $arrcount)
			{
				$whereDetails .= "`$keyw`=:$keyw" . " and ";
			}
			else
			{
				$whereDetails .= "`$keyw`=:$keyw,";
			}
			
			//$whereDetails .= "`$keyw`=:$keyw,";
        }

		
		$whereDetails = rtrim($whereDetails, ',');

        $sth = $this->prepare("UPDATE $table SET $fieldDetails WHERE $whereDetails");
        echo "UPDATE " . $table . " SET " . $fieldDetails . " WHERE " . $whereDetails;
		echo "<br>";
        foreach ($data as $key => $value) {
           echo $key . "===" . strip_tags($value) . "<br>";
			$sth->bindValue(":$key", self::fixstr($value)); //////////////////////////////////////this line////////////////////////////////////////////////////////
			//$sth->bindValue(":$key", $this->fixstr($value));////////////////////////////////////////////////or this line///////////////////////////////////////////
			
        }
		foreach ($wheredata as $keyw => $valuew) {
            $sth->bindValue(":$keyw", strip_tags($valuew));
        }

        $sth->execute();
    }

and :


public function fixstr($rvalue) {
$this->rvalue = empty($rvalue) && !is_numeric($rvalue) ? NULL : trim(strip_tags($rvalue));
return $this->rvalue;

}

This works. But if I call the function using:


$sth->bindValue(":$key", $this->fixstr($value));

and change the function to:


public function fixstr($rvalue) {
$rvalue = empty($rvalue) && !is_numeric($rvalue) ? NULL : trim(strip_tags($rvalue));
return $rvalue;
}

This also works. Which is the correct way to call a function in the same class?
Just for info: I use this so 0000-00-00 doesn’t show in a date field that should be null.
But it works on all string/varchar fields.

2

Hi,

Generally speaking, you want to be using $this to access methods and properties within an object. Self:: and $this are sometimes interchangeable, but there are some subtle differences.

3