mysqli_fetch_array()函数从结果集中取得一行作为关联数组,或数字数组,或二者兼有。
PHP result对象(mysqli_result类)表示MySQL结果,由SELECT或DESCRIBE或EXPLAIN查询返回。
mysqli_fetch_array()函数的作用是:接受一个结果对象作为参数,检索给定结果对象中当前行的内容,并将其作为关联数组或数值数组返回。
mysqli_fetch_array($result, [$type]);
序号 | 参数及说明 |
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1 | result(必需) 这是表示结果对象的标识符。 |
2 | type(必需) 这是一个整数值,指定返回数组的类型。该type的值是以下值之一-
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PHP mysqli_fetch_array()函数返回一个数组(关联或数字),该数组保存结果对象的当前行。如果没有更多行,此函数将返回NULL。
此函数最初是在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_fetch_array()函数的用法(面向过程风格),从结果集中取得行作为数字数组或关联数组,并打印输出字段值:
<?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("创建表.....\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("插入记录.....\n"); //检索表的内容 $res = mysqli_query($con, "SELECT * FROM myplayers"); //获取所有行作为数组 while($row = mysqli_fetch_array($res, MYSQLI_ASSOC)){ print("ID: ".$row["ID"]."\n"); print("First_Name: ".$row["First_Name"]."\n"); print("Last_Name: ".$row["Last_Name"]."\n"); print("Place_Of_Birth: ".$row["Place_Of_Birth"]."\n"); print("Country: ".$row["Country"]."\n"); } //结束语句 mysqli_free_result($res); //关闭连接 mysqli_close($con); ?>
输出结果
创建表..... 插入记录..... ID: 1 First_Name: Sikhar Last_Name: Dhawan Place_Of_Birth: Delhi Country: India ID: 2 First_Name: Jonathan Last_Name: Trott Place_Of_Birth: CapeTown Country: SouthAfrica ID: 3 First_Name: Kumara Last_Name: Sangakkara Place_Of_Birth: Matale Country: Srilanka
在面向对象风格中,此函数的语法为$result->fetch_array();。以下是面向对象风格中此函数的示例;
<?php //建立连接 $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("创建表.....\n"); $stmt = $con -> prepare( "SELECT * FROM Test WHERE Name in(?, ?)"); $stmt -> bind_param("ss", $name1, $name2); $name1 = 'Raju'; $name2 = 'Rahman'; //执行语句 $stmt->execute(); //检索结果 $result = $stmt->get_result(); //获取所有行作为数组 while($row = $result->fetch_array(MYSQLI_ASSOC)){ print("Name: ".$row["Name"]."\n"); print("Age: ".$row["Age"]."\n"); } //结束语句 $stmt->close(); //关闭连接 $con->close(); ?>
输出结果
创建表..... Name: Raju Age: 25 Name: Rahman Age: 30
您还可以将结果行的内容检索为数字数组:
<?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("创建表.....\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("插入记录.....\n"); //检索表的内容 $res = mysqli_query($con, "SELECT * FROM myplayers"); //获取所有行作为数组 while($row = mysqli_fetch_array($res, MYSQLI_NUM)){ print("ID: ".$row[0]."\n"); print("First_Name: ".$row[1]."\n"); print("Last_Name: ".$row[2]."\n"); print("Place_Of_Birth: ".$row[3]."\n"); print("Country: ".$row[4]."\n"); } //结束语句 mysqli_free_result($res); //关闭连接 mysqli_close($con); ?>
输出结果
创建表..... 插入记录..... ID: 1 First_Name: Sikhar Last_Name: Dhawan Place_Of_Birth: Delhi Country: India ID: 2 First_Name: Jonathan Last_Name: Trott Place_Of_Birth: CapeTown Country: SouthAfrica ID: 3 First_Name: Kumara Last_Name: Sangakkara Place_Of_Birth: Matale Country: Srilanka