mysqli_stmt_bind_result()函數(shù)將變量綁定到預處理語句以存儲結果
mysqli_stmt_bind_result()函數(shù)用于將結果集的列綁定到變量。綁定變量后，您需要調用 mysqli_stmt_fetch() 函數(shù)以獲取指定變量中的列的值。
mysqli_stmt_bind_result($stmt, $var1, $var2...);
| 序號 | 參數(shù)及說明 |
|---|---|
| 1 | stmt(必需) 這是表示準備好的語句的對象。 |
| 2 | var1(必需) 這表示要綁定到列的變量。 |
PHP mysqli_stmt_bind_result()函數(shù)返回一個布爾值，成功時為true，失敗時為false。
此函數(shù)最初是在PHP版本5中引入的，并且可以在所有更高版本中使用。
以下示例演示了mysqli_stmt_bind_result()函數(shù)的用法（面向過程風格）,將結果綁定到變量：
<?php
$con = mysqli_connect("localhost", "root", "password", "mydb");
mysqli_query($con, "CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
print("創(chuàng)建表.....\n");
mysqli_query($con, "INSERT INTO myplayers values(1, 'Sikhar', 'Dhawan', 'Delhi', 'India')");
mysqli_query($con, "INSERT INTO myplayers values(2, 'Jonathan', 'Trott', 'CapeTown', 'SouthAfrica')");
mysqli_query($con, "INSERT INTO myplayers values(3, 'Kumara', 'Sangakkara', 'Matale', 'Srilanka')");
print("插入記錄.....\n");
//檢索表的內容
$stmt = mysqli_prepare($con, "SELECT * FROM myplayers");
//執(zhí)行語句
mysqli_stmt_execute($stmt);
//將結果中的值綁定到變量
mysqli_stmt_bind_result($stmt, $id, $fname, $lname, $pob, $country);
while (mysqli_stmt_fetch($stmt)) {
print("Id: ".$id."\n");
print("fname: ".$fname."\n");
print("lname: ".$lname."\n");
print("pob: ".$pob."\n");
print("country: ".$country."\n");
print("\n");
}
//結束語句
mysqli_stmt_close($stmt);
//關閉連接
mysqli_close($con);
?>輸出結果
創(chuàng)建表..... 插入記錄..... Id: 1 fname: Sikhar lname: Dhawan pob: Delhi country: India Id: 2 fname: Jonathan lname: Trott pob: CapeTown country: SouthAfrica Id: 3 fname: Kumara lname: Sangakkara pob: Matale country: Srilanka
在面向對象風格中，此函數(shù)的語法為$stmt-> bind_result();。以下是面向對象風格中此函數(shù)的示例，將變量綁定到結果集：
<?php
//建立連接
$con = new mysqli("localhost", "root", "password", "mydb");
$con -> query("CREATE TABLE Test(Name VARCHAR(255), AGE INT)");
$con -> query("insert into Test values('Raju', 25),('Rahman', 30),('Sarmista', 27)");
print("創(chuàng)建表.....\n");
$stmt = $con -> prepare( "SELECT * FROM Test WHERE Name in(?, ?)");
$stmt -> bind_param("ss", $name1, $name2);
$name1 = 'Raju';
$name2 = 'Rahman';
print("Records Deleted.....\n");
//執(zhí)行語句
$stmt->execute();
//將變量綁定到結果集
$stmt->bind_result($name, $age);
while ($stmt->fetch()) {
print("Name: ".$name."\n");
print("Age: ".$age."\n");
}
//結束語句
$stmt->close();
//關閉連接
$con->close();
?>輸出結果
創(chuàng)建表..... Records Deleted..... Name: Raju Age: 25 Name: Rahman Age: 30
以下示例使用 mysqli_stmt_bind_result() 和 mysqli_stmt_fetch() 函數(shù)獲取DESCRIBE查詢的結果，并將結果中的值綁定到變量：
<?php
$con = mysqli_connect("localhost", "root", "password", "mydb");
mysqli_query($con, "CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
print("創(chuàng)建表.....\n");
//Description of the table
$stmt = mysqli_prepare($con, "DESC myplayers");
//執(zhí)行語句
mysqli_stmt_execute($stmt);
//將結果中的值綁定到變量
mysqli_stmt_bind_result($stmt, $field, $type, $null, $key, $default, $extra);
while (mysqli_stmt_fetch($stmt)) {
print("Field: ".$field."\n");
print("Type: ".$type."\n");
print("Null: ".$null."\n");
print("Key: ".$key."\n");
print("Default: ".$default."\n");
print("Extra: ".$extra."\n");
print("\n");
}
//結束語句
mysqli_stmt_close($stmt);
//關閉連接
mysqli_close($con);
?>輸出結果
創(chuàng)建表..... Field: ID Type: int(11) Null: YES Key: Default: Extra: Field: First_Name Type: varchar(255) Null: YES Key: Default: Extra: Field: Last_Name Type: varchar(255) Null: YES Key: Default: Extra: Field: Place_Of_Birth Type: varchar(255) Null: YES Key: Default: Extra: Field: Country Type: varchar(255) Null: YES Key: Default: Extra:
以下示例使用 mysqli_stmt_bind_result() 和 mysqli_stmt_fetch() 函數(shù)獲取SHOW TABLES查詢的結果，列出數(shù)據(jù)庫中所有的數(shù)據(jù)表:
<?php
$con = mysqli_connect("localhost", "root", "password");
//Selecting the database
mysqli_query($con, "CREATE DATABASE NewDatabase");
mysqli_select_db($con, "NewDatabase");
//Creating tables
mysqli_query($con, "CREATE TABLE test1(Name VARCHAR(255), Age INT)");
mysqli_query($con, "CREATE TABLE test2(Name VARCHAR(255), Age INT)");
mysqli_query($con, "CREATE TABLE test3(Name VARCHAR(255), Age INT)");
print("Tables Created.....\n");
//表的說明
$stmt = mysqli_prepare($con, "SHOW TABLES");
//執(zhí)行語句
mysqli_stmt_execute($stmt);
//將結果中的值綁定到變量
mysqli_stmt_bind_result($stmt, $table_name);
print("當前數(shù)據(jù)庫中所有的表如下: \n");
while (mysqli_stmt_fetch($stmt)) {
print($table_name."\n");
}
//結束語句
mysqli_stmt_close($stmt);
//關閉連接
mysqli_close($con);
?>輸出結果
Tables Created..... 當前數(shù)據(jù)庫中所有的表如下: test1 test2 test3