mysqli_stmt_error()函數(shù)返回發(fā)生錯誤的描述
mysqli_stmt_error()函數(shù)返回在執(zhí)行最后一條語句期間發(fā)生的錯誤的描述。
mysqli_stmt_error($stmt)
| 序號 | 參數(shù)及說明 |
|---|---|
| 1 | stmt(必需) 這是一個表示語句的對象。 |
PHP mysqli_stmt_error()函數(shù)返回一個字符串值，該字符串值表示對在執(zhí)行最后一條語句期間發(fā)生的錯誤的描述。如果沒有錯誤，則此函數(shù)返回一個空字符串。
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_error()函數(shù)的用法（面向過程風格）-
<?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')");
print("插入記錄.....\n");
$stmt = mysqli_prepare($con, "SELECT * FROM myplayers");
mysqli_query($con, "DROP TABLE myplayers");
//執(zhí)行語句
mysqli_stmt_execute($stmt);
//錯誤
$error = mysqli_stmt_error($stmt);
print("Error : ".$error);
//結(jié)束語
mysqli_stmt_close($stmt);
//關(guān)閉連接
mysqli_close($con);
?>輸出結(jié)果
創(chuàng)建表..... 插入記錄..... Error : Table 'mydb.myplayers' doesn't exist
在面向?qū)ο箫L格中，此函數(shù)的語法為$con->error。以下是面向?qū)ο箫L格的此函數(shù)的示例-
<?php
//建立連接
$con = new mysqli("localhost", "root", "password", "mydb");
$con -> query("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");
$con -> query("INSERT INTO myplayers values(1, 'Sikhar', 'Dhawan', 'Delhi', 'India')");
print("插入記錄.....\n");
$stmt = $con ->prepare("SELECT * FROM myplayers");
$con ->query("DROP TABLE myplayers");
//執(zhí)行語句
$stmt->execute();
//Error
$error = $stmt ->error;
print("Error: ".$error);
//結(jié)束語句
$stmt->close();
//關(guān)閉連接
$con->close();
?>輸出結(jié)果
創(chuàng)建表..... 插入記錄..... Error : Table 'mydb.myplayers' doesn't exist
如果最后執(zhí)行的語句對象中沒有錯誤，則此函數(shù)返回一個空字符串-
<?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("Table Created.....\n");
$query = "INSERT INTO myplayers values(1, 'Sikhar', 'Dhawan', 'Delhi', 'India'),(2, 'Jonathan', 'Trott', 'CapeTown', 'SouthAfrica'),(3, 'Kumara', 'Sangakkara', 'Matale', 'Srilanka')";
//預(yù)處理語句
$stmt = mysqli_prepare($con, $query);
//執(zhí)行該語句
mysqli_stmt_execute($stmt);
print("插入記錄.....\n");
//Error
$error = mysqli_stmt_error($stmt);
print("Error : ".$error);
//結(jié)束語句
mysqli_stmt_close($stmt);
//關(guān)閉連接
mysqli_close($con);
?>輸出結(jié)果
創(chuàng)建表..... 插入記錄..... Error :