PHP mysqli_fetch_assoc() 函数

定义和用法

PHP 结果对象（mysqli_result 类）表示由 SELECT、DESCRIBE 或 EXPLAIN 查询返回的 MySQL 结果。

mysqli_fetch_assoc() 函数接受结果对象作为参数，检索给定结果对象中当前行的内容，并将其作为关联数组返回。

语法

mysqli_fetch_assoc($result);

参数

返回值

PHP mysqli_fetch_assoc() 函数返回一个关联数组，其中包含结果对象的当前行。如果不再有行，则此函数返回 NULL。

PHP 版本

此函数首次引入于 PHP 5 版本，并在所有后续版本中均有效。

示例

以下示例演示了 mysqli_fetch_assoc() 函数（过程式风格）的用法：

<?php
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   mysqli_query($con, "CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
   print("Table Created.....\n");
   mysqli_query($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("Record Inserted.....\n");

   //Retrieving the contents of the table
   $res = mysqli_query($con, "SELECT * FROM myplayers");

   //Fetching all the rows as objects
   while($obj = mysqli_fetch_assoc($res)){
      print("ID: ".$obj["ID"]."\n");
      print("First_Name: ".$obj["First_Name"]."\n");
      print("Last_Name: ".$obj["Last_Name"]."\n");
      print("Place_Of_Birth: ".$obj["Place_Of_Birth"]."\n");
      print("Country: ".$obj["Country"]."\n");
   }
   //Closing the statement
   mysqli_free_result($res);

   //Closing the connection
   mysqli_close($con);
?>

这将产生以下结果：

Table Created.....
Record Inserted.....
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

示例

在面向对象风格中，此函数的语法为 $result->fetch_assoc(); 以下是此函数在面向对象风格中的示例：

<?php
   //Creating a connection
   $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("Table Created.....\n");

   $stmt = $con -> prepare( "SELECT * FROM Test WHERE Name in(?, ?)");
   $stmt -> bind_param("ss", $name1, $name2);
   $name1 = 'Raju';
   $name2 = 'Rahman';

   //Executing the statement
   $stmt->execute();

   //Retrieving the result
   $result = $stmt->get_result();

   //Fetching all the rows as arrays
   while($obj = $result->fetch_assoc()){	
      print("Name: ".$obj["Name"]."\n");
      print("Age: ".$obj["Age"]."\n");
   }

   //Closing the statement
   $stmt->close();

   //Closing the connection
   $con->close();
?>

这将产生以下结果：

Table Created.....
Name: Raju
Age: 25
Name: Rahman
Age: 30