PHP中MySql函数收集

1.array mysql_fetch_assoc ( resource $result ) 从结果集中取得一行作为关联数组

说明：

　　 返回对应结果集的关联数组，并且继续移动内部数据指针。

参数：result

　　  resource 型的结果集。此结果集来自对 mysql_query() 的调用。

实例：

<?php
 
$conn  =  mysql_connect ( "localhost" ,  "mysql_user" ,  "mysql_password" );  
 
if (! $conn ) {
    echo  "Unable to connect to DB: "  .  mysql_error ();
    exit;
}
  
if (! mysql_select_db ( "mydbname" )) { 
　　 mysql_colse($conn);
    echo  "Unable to select mydbname: "  .  mysql_error ();
    exit;
}
 
$sql  =  "SELECT id as userid, fullname, userstatus 
        　　　FROM   sometable
  　　        WHERE  userstatus = 1" ;
 
$result  =  mysql_query ( $sql, $conn );
 
if (! $result ) {
    echo  "Could not successfully run query ( $sql ) from DB: "  .  mysql_error ();
    exit;
}
 
if ( mysql_num_rows ( $result ) ==  0 ) {
    echo  "No rows found, nothing to print so am exiting" ;
    exit;
}
 
// While a row of data exists, put that row in $row as an associative array
// Note: If you're expecting just one row, no need to use a loop
// Note: If you put extract($row); inside the following loop, you'll
//       then create $userid, $fullname, and $userstatus
 while ( $row  =  mysql_fetch_assoc ( $result )) {
    echo  $row [ "userid" ];
    echo  $row [ "fullname" ];
    echo  $row [ "userstatus" ];
}
 
mysql_free_result ( $result );
 
?> 

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