PDO execute problem - php

Question

I have faced a problem .I want to select all rows by executing this function:
public function executeQuery($query,$fetch_mode=null) {
$rs = null;
if ($stmt = $this->getConnection()->prepare($query)) {
if ($this->executePreparedStatement($stmt, $rs,$fetch_mode)) {
return $rs;
}
} else {
throw new DBError($this->getConnection()->errorInfo());
}
}
private function executePreparedStatement($stmt, & $row = null,$fetch_mode=null) {
$boReturn = false;
if($fetch_mode==null) $fetch_mode=$this->fetch_mode;
if ($stmt->execute()) {
if ($row = $stmt->fetch($fetch_mode)) {
$boReturn = true;
} else {
$boReturn = false;
}
} else {
$boReturn = false;
}
return $boReturn;
}
But when I call it from my index page:
$objDB=new DB();
$objDB->connect();
// executeQuery returns an array
$result=$objDB->executeQuery("SELECT * FROM admin");
var_dump($result);
Only a single row is retrieved instead of all rows.
I also set mode using:
$result=$objDB->executeQuery("SELECT * FROM admin",PDO::FETCH_ASSOC);
But it still does not work.

Answer 1

The fetch method returns only the current row and sets the row pointer to the next row. To read all data in a PHP array you can use fetchAll().
Additionally return-by-reference is no good idea in PHP as it messes with PHP's copy-on-write mechanism and often creates trouble.
So I'd write oyure code something like this:
public function executeQuery($query,$fetch_mode=null) {
if ($stmt = $this->getConnection()->prepare($query)) {
$ret = $this->executePreparedStatement($stmt, $fetch_mode);
return $ret;
}
throw new DBError($this->getConnection()->errorInfo());
}
private function executePreparedStatement($stmt, $fetch_mode=null) {
if($fetch_mode==null) $fetch_mode=$this->fetch_mode;
if ($stmt->execute()) {
if ($rows = $stmt->fetchAll($fetch_mode)) {
return $rows;
}
}
return false;
}