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PDO? ???? PHP?? MySQL ?? ???? ?? ??
? ??? ??? MySQL ???? PHP?? PDO? ???? MySQL ?? ?????? ??? ???? ??? ??????

PHP?? PDO? ???? MySQL ?? ?????? ??? ???? ??? ??????

Nov 08, 2024 am 05:03 AM

How to Retrieve Output from MySQL Stored Procedures Using PDO in PHP?

PDO? ???? PHP?? MySQL ?? ???? ?? ??

??:

LAST_INSERT_ID() ?? ???? ?? PHP ? PDO? ???? MySQL ?? ???????

????:

?? PHP ??? ?????.

<?php
$stmt = $db->prepare("CALL simpleProcedure(:name,:returnid)");
$stmt->bindValue(':name', $name, PDO::PARAM_STR);
$stmt->bindParam(':returnid', $returnid, PDO::PARAM_INT, 11);
$stmt->execute();
echo $returnid;
?>

? ??? ????? ????. PDO? ?? ??? ?? ???? ????.

???:

MySQL ?????? ??? ????? ?? ??? ????.

1??: ???? ??

??? ???? ????? ???? ??? ??? MySQL ??? ?????. ?:

<?php
$stmt = $db->prepare("CALL simpleProcedure(:name, @returnid)");
$stmt->bindValue(':name', $name, PDO::PARAM_STR);
$stmt->execute();
?>

2??: MySQL ?? ??

??? ??? ???? MySQL ??? ?????.

<?php
$stmt = $db->query("SELECT @returnid");
$result = $stmt->fetchAll(PDO::FETCH_COLUMN, 0);
$returnid = $result[0];
?>

?:

?? ???? ??? ???? ??(IN, INOUT, OUT)? ?? ?? ??? ???? ?? ??? ?? ???? ????.

SQL ???? :

CREATE PROCEDURE `demoSpInOutSqlVars`(
    IN     pInput_Param  INT, 
    /* --- */  
    INOUT  pInOut_Param  INT, 
    OUT    pOut_Param    INT)
BEGIN
    /*
     * Pass the full names of SQL User Variable for these parameters. e.g. '@varInOutParam'
     * These 'SQL user variables names' are the variables that Mysql will use for:
     *    1) finding values
     *    2) storing results
     *
     * It is similar to 'variable variables' in PHP.  
     */
     SET pInOut_Param      := ABS(pInput_Param) + ABS(pInOut_Param); 
     SET pOut_Param        := ABS(pInput_Param) * -3;                
END$$

PHP ??:

<?php
// Bind PHP variables
$phpInParam = 5;                  
$phpInOutParam = 404;
$phpOutParam = null;

// Prepare the SQL procedure call
$sql = "call demoSpInOut(:phpInParam, 
                         @varInOutParam, 
                         @varOutParam)";

$stmt = $db->prepare($sql);
$stmt->bindParam(':phpInParam', $phpInParam, PDO::PARAM_INT);

// Set the SQL User INOUT variables
$db->exec("SET @varInOutParam = $phpInOutParam");

// Execute the procedure
$stmt->execute();

// Get the SQL variables into PHP variables
$sql = "SELECT @varInOutParam AS phpInOutParam,
               @varOutParam   AS phpOutParam
        FROM dual";

$results = $db->query($sql)->fetchAll(PDO::FETCH_ASSOC);
$phpInOutParam = $results[0]['phpInOutParam'];
$phpOutParam = $results[0]['phpOutParam'];

// Display the PHP variables
echo "phpInParam: $phpInParam<br>";
echo "phpInOutParam: $phpInOutParam<br>";
echo "phpOutParam: $phpOutParam<br>";
?>

? ??? ??? PDO? ???? MySQL ?? ????? ??? ????? ??? ? ????.

? ??? PHP?? PDO? ???? MySQL ?? ?????? ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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