mysqli_fetch_object()函數(shù)從結(jié)果集中取得當(dāng)前行,并作為對象返回。
注意:該函數(shù)返回的字段名是區(qū)分大小寫的。
一個PHP結(jié)果對象(mysqli_result類)表示由SELECT或DESCRIBE或EXPLAIN查詢返回的MySQL結(jié)果。
mysqli_fetch_object()函數(shù)接受一個結(jié)果對象作為參數(shù),在給定的結(jié)果中檢索當(dāng)前行的內(nèi)容,并且將它們作為一個對象。
mysqli_fetch_object($result, [$class_name, $params]);
序號 | 參數(shù)及說明 |
---|---|
1 | result(必需) 這是表示結(jié)果對象的標(biāo)識符。 |
2 | class_name(可選) 要實例化的類的名稱,設(shè)置其屬性并返回。 |
3 | params(可選) 指定一個傳給 class_name 對象構(gòu)造器的參數(shù)數(shù)組。 |
PHP mysqli_fetch_object()函數(shù)返回一個對象(具有字符串屬性),該對象保存結(jié)果對象的當(dāng)前行。如果沒有更多行,此函數(shù)將返回NULL。
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_fetch_object()函數(shù)的用法(面向過程風(fēng)格),返回結(jié)果集中的所有行,然后輸出每個字段的值:
<?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("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(nèi)容 $res = mysqli_query($con, "SELECT * FROM myplayers"); //獲取所有行作為對象 while($obj = mysqli_fetch_object($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: ".$obj->Country."\n"); } //結(jié)束語句 mysqli_free_result($res); //關(guān)閉連接 mysqli_close($con); ?>
輸出結(jié)果
創(chuàng)建表..... 插入記錄..... ID: 1 First_Name: Sikhar Last_Name: Dhawan Place_Of_Birth: Delhi Country: India ID: 2 First_Name: Jonathan Last_Name: Trott Place_Of_Birth: CapeTown Country: SouthAfrica ID: 3 First_Name: Kumara Last_Name: Sangakkara Place_Of_Birth: Matale Country: Srilanka
在面向?qū)ο箫L(fēng)格中,此函數(shù)的語法為$result-> fetch_object();。以下是面向?qū)ο箫L(fēng)格中此函數(shù)的示例;
<?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'; //執(zhí)行語句 $stmt->execute(); //檢索結(jié)果 $result = $stmt->get_result(); //獲取所有行作為數(shù)組 while($obj = $result->fetch_object()){ print("Name: ".$obj->Name."\n"); print("Age: ".$obj->Age."\n"); } //結(jié)束語句 $stmt->close(); //關(guān)閉連接 $con->close(); ?>
輸出結(jié)果
創(chuàng)建表..... Name: Raju Age: 25 Name: Rahman Age: 30