| 說 明 | 函 數(shù) 名 | 函 數(shù) 詳 細 | 函 數(shù) 說 明 |
| 建立數(shù)據(jù)庫連接 | mysql_connect() | resource mysql_connect([string hostname [:port] [:/path/to/socket] [, string username] [, string password]]) 示例：$conn = @mysql_connect("localhost", "username", "password") or dir("不能連接到mysql server"); | 使用該連接必須顯示的關(guān)閉連接 |
| 建立數(shù)據(jù)庫連接 | mysql_pconnect() | resource mysql_pconnect([string hostname [:port] [:/path/to/socket] [, string username] [, string password]]) 示例：$conn = @mysql_pconnect("localhost", "username", "password") or dir("不能連接到mysql server"); | 使用該連接函數(shù)不需要顯示的關(guān)閉連接，它相當(dāng)于使用了連接池 |
| 關(guān)閉數(shù)據(jù)庫連接 | mysql_close() | $conn = @mysql_connect("localhost", "username", "password") or die("不能連接到mysql server"); @mysql_select_db("mydatabase") or die("不能選擇這個數(shù)據(jù)庫，或數(shù)據(jù)庫不存在"); echo "你已經(jīng)連接到mydatabase數(shù)據(jù)庫"; mysql_close(); | |
| 選擇數(shù)據(jù)庫 | mysql_select_db() | boolean mysql_select_db(string db_name [, resource link_id]) $conn = @mysql_connect("localhost", "username", "password") or die("不能連接到mysql server"); @mysql_select_db("mydatabase") or die("不能選擇這個數(shù)據(jù)庫，或數(shù)據(jù)庫不存在"); | |
| 查詢mysql | mysql_query() | resource mysql_query (string query, [resource link_id]) $linkid = @mysql_connect("localhost", "username", "password") or die("不能連接到mysql server"); @mysql_select_db("mydatabase") or die("不能選擇這個數(shù)據(jù)庫，或者數(shù)據(jù)庫不存在"); $query = "select * from mytable"; $result = mysql_query($query); mysql_close(); | 若sql查詢執(zhí)行成功，則返回資源標識符，失敗時返回false。若執(zhí)行更新成功，則返回true，否則返回false |
| 查詢mysql | mysql_db_query() | resource mysql_db_query(string database, string query [, resource link_id]) $linkid = @mysql_connect("localhost", "username", "password") or die("不能連接到mysqlserver"); $query = "select * from mytable"; $result = mysql_db_query("mydatabase", $query); mysql_close(); | 為了使代碼清晰，不推薦使用這個函數(shù)調(diào)用 |
| 獲取和顯示數(shù)據(jù) | mysql_result() | mixed mysql_result (resource result_set, int row [, mixed field]) $query = "select id, name from mytable order by name"; $result = mysql_query($query); $c_id = mysql_result($result, 0, "id"); $c_name = mysql_result($result, 0, "name"); | 最簡單、也是效率最低的數(shù)據(jù)獲取函數(shù) |
| 獲取和顯示數(shù)據(jù) | mysql_fetch_row() | array mysql_fetch_row (resource result_set) $query = "select id, name from mytable order by name"; $result = mysql_query($query); while (list($id, $name) = mysql_fetch_row($result)) { echo("name: $name ($id) <br />"); } | 函數(shù)從result_set中獲取整個數(shù)據(jù)行，將值放在一個索引數(shù)組中。通常會結(jié)使list()函數(shù)使用 |
| 獲取和顯示數(shù)據(jù) | mysql_fetch_array() | array mysql_fetch_array (resource result_set [, int result_type]) $query = "select id, name from mytable order by name"; $result = mysql_query($query); while($row = mysql_fetch_array($result, mysql_assoc)) { $id = $row["id"]; $name = $row["name"]; echo "name: $name ($id) <br />"; } | result_type的值有： mysql_assoc: 字段名表示鍵，字段內(nèi)容為值 mysql_num: 數(shù)值索引數(shù)組，操作與mysql_fetch_ros()函數(shù)一樣 mysql_both: 即作為關(guān)聯(lián)數(shù)組又作為數(shù)值索引數(shù)組返回。result_type的默認值。 |
| 獲取和顯示數(shù)據(jù) | mysql_fetch_assoc() | array mysql_fetch_assoc (resource result_set) 相當(dāng)于調(diào)用 mysql_fetch_array(resource, mysql_assoc); | |
| 獲取和顯示數(shù)據(jù) | mysql_fetch_object() | object mysql_fetch_object(resource result_set) $query = "select id, name from mytable order by name"; while ($row = mysql_fetch_object($result)) { $id = $row->id; $name = $row->name; echo "name: $name ($id) <br />"; } | 在操作上與mysql_fetch_array()相同 |
| 所選擇的記錄 | mysql_num_rows() | int mysql_num_rows(resource result_set) #query = "select id, name from mytable where id > 65"; $result = mysql_query($query); echo "有".mysql_num_rows($result)."條記錄的id大于65"; | 只在確定select查詢所獲取的記錄數(shù)時才有用。 |
| 受影響的記錄 | mysql_affected_rows() | int mysql_affected_rows([resource link_id]) $query = "update mytable set name='cheneyfu' where id>=5"; $result = mysql_query($query); echo "id大于等于5的名稱被更新了的記錄數(shù)：".mysql_affected_rows(); | 該函數(shù)獲取受insert,update或delete更新語句影響的行數(shù) |
| 獲取數(shù)據(jù)庫列表信息 | mysql_list_dbs() | resource mysql_list_dbs([resource link_id]) mysql_connect("localhost", "username", "password"); $dbs = mysql_list_dbs(); echo "databases: <br />"; while (list($db) = mysql_fetch_rows($dbs)) { echo "$db <br />"; } | |
| 獲取數(shù)據(jù)庫名 | mysql_db_name() | string mysql_db_name(resource result_set, integer index) | 該函數(shù)獲取在mysql_list_dbs()所返回result_set中位于指定index索引的數(shù)據(jù)庫名 |
| 獲取數(shù)據(jù)庫表列表 | mysql_list_tables() | resource mysql_list_tables(string database [, resource link_id]) mysql_connect("localhost", "username", "password"); $tables = mysql_list_tables("mydatabase"); while (list($table) = mysql_fetch_row($tables)) { echo "$table <br />"; } | 該函數(shù)獲取database中所有表的表名 |
| 獲取數(shù)據(jù)庫表名 | mysql_tablename() | string mysql_tablename(resource result_set, integer index) mysql_connect("localhost", "username", "password"); $tables = mysql_list_tables("mydatabase"); $count = -1; while (++$count < mysql_numrows($tables)) { echo mysql_tablename($tables, $count)."<br />"; } | 該函數(shù)獲取mysql_list_tables()所返回result_set中位于指定index索引的表名 |
| 獲取字段信息 | mysql_fetch_field() | object mysql_fetch_field(resource result [, int field_offset]) mysql_connect("localhost", "username", "password"); mysql_select_db("mydatabase"); $query = "select * from mytable"; $result = mysql_query($query); $fields = mysql_num_fields($result); for($count = 0; $count < $fieds; $count++) { $field = mysql_fetch_field($result, $count); echo "<p>$field->name $field->type ($field->max_length) </p>"; } | 返回的對象共有12個對象屬性： name: 字段名 table: 字段所在的表 max_length: 字段的最大長度 not_null: 如果字段不能為null，則為1，否則0 primary_key: 如果字段為主鍵，則為1，否則0 unique_key: 如果字段是唯一鍵，則為1， 否則0 multiple_key: 如果字段為非唯一，則為1，否則0 numeric: 如果字段為數(shù)值則為1，否則0 blob: 如果字段為blob則為1，否則為0 type: 字段的數(shù)據(jù)類型 unsigned: 如果字段為無符號數(shù)則為1，否則為0 zerofill: 如果字段為“零填充”則為1， 否則為0 |
| 獲取查詢的字段數(shù) | mysql_num_fields() | integer mysql_num_fields (resource result_set) $query = "select id, name from mytable order by name"; $result = mysql_query($query); echo "這個查詢的字段數(shù)是：".mysql_num_fields($result)."<br />"; | 返回查詢result_set中的字段數(shù) |
| 獲取指定表的所有字段的字段名 | mysql_list_fields() | resource mysql_list_fields (string database_name, string table_name [, resource link_id]) $fields = mysql_list_fields("mydatabase", "mytable"); echo "數(shù)據(jù)庫mydatabase中表mytable的字段數(shù)： ".mysql_num_fields($fields)."<br />"; | |
| 獲取指定的字段選項 | mysql_field_flags() | string mysql_field_flags (resource result_set, integer field_offset) | |
| 獲取指定的字段的最大長度 | mysql_field_len() | integer mysql_field_len (resource result_set, integer field_offset) $query = "select name from mytable"; $result = mysql_query($query); $row = mysql_fetch_row($result); echo mysql_field_len($result, 0)."<br />"; | 如果mysql_field_len($reseult, 0) = 16777215 那么numer_format(mysql_field_len($result))等于16,777,215 |
| 獲取字段名 | mysql_field_name() | string mysql_field_name (resource result_set, int field_offset) $query = "select id as pkid, name from mytable order by name"; $result = mysql_query($query); $row = mysql_fetch_row($result); echo mysql_field_name($result, 0); // result: pkid | |
| 獲取字段類型 | mysql_field_type() | string mysql_field_type (resource result_set, int field_offset) $query = "select id, name from mytable order by name"; $result = mysql_query($query); $row = mysql_fetch_row($result); echo mysql_field_type($result, 0); // result: int | |
| 獲取字段所在表名 | mysql_field_table() | string mysql_field_table (resource result_set, int field_offset) $query = "select id as pkid, name from mytable order by name"; $result = mysql_query($query); $row = mysql_fetch_row($result); echo mysql_field_table($result, 0); // |
新聞熱點
疑難解答
圖片精選
