innstory

PDO bindParam 和 bindValue 差別在哪裡?

Temperature: 0 °C

2020-08-13Mark Chang

首先 bindParam 是綁定變數、bindValue  是綁定值。
以下範例：
bindParam

＜?php

try {

$dbh = new PDO("mysql:host=localhost;dbname=test", "root", "");

$dbh-＞setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$stmt = $dbh-＞prepare("SELECT * FROM tablename WHERE number = ?");

$stmt-＞bindParam(1, $test_value, PDO::PARAM_INT);

$test_value = 888;

$stmt-＞execute();

print_r($stmt-＞fetchAll());

} catch(PDOException $e) {

echo $e-＞getMessage();

}

?＞ 

＜?php

try {

$dbh = new PDO("mysql:host=localhost;dbname=test", "root", "");

$dbh-＞setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$stmt = $dbh-＞prepare("SELECT * FROM tablename WHERE number = ?");

$stmt-＞bindValue(1, $test_value, PDO::PARAM_INT);

$test_value = 888;

$stmt-＞execute();

print_r($stmt-＞fetchAll());

} catch(PDOException $e) {

echo $e-＞getMessage();

}

?＞