[英]Do these functions check if there's a connection to the database and display the data?
有人可以解釋這兩個功能的作用嗎? 我認為他們會檢查您是否連接到數據庫,並且如果沒有顯示錯誤,但我不確定。 我也不知道發生了什么事情。 有人可以解釋一下嗎?
<?php
private function getData($sqlQuery) {
$result = mysqli_query($this->dbConnect, $sqlQuery);
if(!$result){
die('Error in query: '. mysqli_error());
} //peforms a query against database to check it is connected
$data= array();
while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
$data[]=$row;
}
return $data;
}
private function getNumRows($sqlQuery) {
$result = mysqli_query($this->dbConnect, $sqlQuery);
if(!$result){
die('Error in query: '. mysqli_error());
}
$numRows = mysqli_num_rows($result);
return $numRows;
}
}
?>
<?php
private function getData($sqlQuery) { //creates a function named 'getData' with a required parameter
$result = mysqli_query($this->dbConnect, $sqlQuery); //uses mysqli to query against the "$dbConnect" resource using the passed parameter $sqlQuery
if(!$result){ //If the result doesn't exist die
die('Error in query: '. mysqli_error());//die and show error
} //peforms a query against database to check it is connected
$data= array();//create an empty array
while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {//fetch a row using association (aka an array mapped by keys with no numbered index)
$data[]=$row;//array push the returned row
}
return $data;//return an array of arrays that you've gotten from MySqlI
}
private function getNumRows($sqlQuery) {//create a function
$result = mysqli_query($this->dbConnect, $sqlQuery);//query
if(!$result){//if no result die
die('Error in query: '. mysqli_error());//die and show error
}
$numRows = mysqli_num_rows($result);//get the number of rows in the query
return $numRows;//return the number of rows in the query
}
}
?>
希望這可以幫助
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