mysql语句中的冒号是什么意义
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2024-02-16 13:59:16
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mysql语句中的冒号是什么意思?
mysql语句中的冒号是什么意思?
------解决方案--------------------
$db->bandVars(); 传递值
echo $check_query; 就知道了。
------解决方案--------------------
可以看看手册的pdo类
------解决方案--------------------
没有别的意思符号而已,以便区别于 sql 的语法成分
bindVars 方法将定义的符号与实际的变量关联起来
------解决方案--------------------
mysql语句中的冒号是什么意思?
------解决方案--------------------
$db->bandVars(); 传递值
echo $check_query; 就知道了。
------解决方案--------------------
可以看看手册的pdo类
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories $sth->bindParam(':calories', $calories, PDO::PARAM_INT);
$sth->bindParam(':colour', $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
------解决方案--------------------
没有别的意思符号而已,以便区别于 sql 的语法成分
bindVars 方法将定义的符号与实际的变量关联起来
------解决方案--------------------
Example #1 Execute a prepared statement with named placeholders
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories $sth->bindParam(':calories', $calories, PDO::PARAM_INT);
$sth->bindParam(':colour', $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
Example #2 Execute a prepared statement with question mark placeholders
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories $sth->bindParam(1, $calories, PDO::PARAM_INT);
$sth->bindParam(2, $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
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