PHP method to obtain database result set

This article mainly introduces the method of obtaining the database result set in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

PHP often needs to access the database to advance the data in the database, so how to advance the data?

The code to extract the database is as follows:

<?php
include("conn.php");//数据库连接
$sql="select* from study_sql";//查询数据库表名为study_sql所有的数据记录
$res=mysql_query($sql);//向数据库发送一条sql语句
//$arr=mysql_fetch_row($res);//获取数据库中的第一条信息
echo &#39;<table apgn="center" width="800" border="1">&#39;;//获取的数据用表格显示出来
 echo &#39;<cabtion><h1>演示表</h1></cabtion>&#39;;
 while($arr=mysql_fetch_assoc($res)){//取出表study_sql中的所有结果集
  echo &#39;<tr>&#39;;
  foreach($arr as $col){//遍历数据
   echo &#39;<td>&#39;.$col.&#39;</td>&#39;;
  }
  echo "</tr>";
 }
?>

Commonly used SQL functions are as follows:

mysql_affected_rows — Get the number of record rows affected by the previous MySQL operation

mysql_cpent_encoding — Return the name of the character set

mysql_close — Close the MySQL connection

mysql_connect — Open a connection to the MySQL server

mysql_create_db — Create a new MySQL database

mysql_data_seek — Move internal results Pointer

mysql_db_name — Get result data

mysql_db_query — Send a MySQL query

mysql_drop_db — Drop (delete) a MySQL database

mysql_errno — Return to the previous one Numeric encoding of error messages in MySQL operations

mysql_error — Returns the text error message generated by the previous MySQL operation

mysql_escape_string — Escapes a string for use with mysql_query

mysql_fetch_array — Get a row from the result set as an associative array, or a numeric array, or both

mysql_fetch_assoc — Get a row from the result set as an associative array

mysql_fetch_field — Get the column information from the result set and Returned as an object

mysql_fetch_lengths — Get the length of each output in the result set

mysql_fetch_object — Get a row from the result set as an object

mysql_fetch_row — Get a row from the result set as an enumeration Array

mysql_field_flags — Get the flags associated with the specified field from the result

mysql_field_len — Return the length of the specified field

mysql_field_name — Get the field name of the specified field in the result

mysql_field_seek — Set the pointer in the result set to the specified field offset

mysql_field_table — Get the table name where the specified field is located

mysql_field_type — Get the type of the specified field in the result set

mysql_free_result — Release result memory

mysql_get_cpent_info — Get MySQL client information

mysql_get_host_info — Get MySQL host information

mysql_get_proto_info — Get MySQL protocol information

mysql_get_server_info — Get MySQL server information

mysql_info — Get the latest query information

mysql_insert_id — Get the ID generated by the previous INSERT operation

mysql_pst_dbs — List All databases in the MySQL server

mysql_pst_fields — List the fields in the MySQL results

mysql_pst_processes — List the MySQL processes

mysql_pst_tables — List the tables in the MySQL database

mysql_num_fields — Get the number of fields in the result set

mysql_num_rows — Get the number of rows in the result set

mysql_pconnect — Open a persistent connection to the MySQL server

mysql_ping — Ping a server connection, or reconnect if there is no connection

mysql_query — Send a MySQL query

mysql_real_escape_string — Escape special characters in a string used in an SQL statement, taking into account the connection Current character set

mysql_result — Get result data

mysql_select_db — Select MySQL database

mysql_set_charset — Set the client’s character set

mysql_stat — Get the current system status

mysql_tablename — Gets the table name

mysql_thread_id — Returns the ID of the current thread

mysql_unbuffered_query — Sends a SQL query to MySQL without retrieving and caching the result rows

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