如何将串联的MYSQL字符串查询存储到PHP变量中？

Question

When using phpmyadmin I'm able to see a concatenated string that was ran from a query using the concat() method from mysql. However, in actual php code, I don't know how to access the string that was concatenated.

for example, in phpmyadmin, this query:

SELECT CONCAT("SELECT * FROM `account` WHERE 1") FROM `account` 

returns this result:

SELECT * FROM `account` WHERE 1

And the result is what I would want stored in a php variable.

$str = "SELECT * FROM `account` WHERE 1"

Answer 1

Call the fetch() method, it returns an array containing the row data. Then access the result from there. I recommend assigning an alias to the expression, then you can use an associative array for the row.

$result = $pdo->query('SELECT CONCAT("SELECT * FROM `account` WHERE 1") AS str FROM `account`');
$row = $result->fetch(PDO::FETCH_ASSOC);
$str = $row['str'];