在运用PHP语言对数据库进行操作的时候,我们将会用到mysql_X这一函数库。下面我们将为大家详细介绍有关PHP获取显示数据库数据函数的函数。
PHP获取显示数据库数据函数之 mysql_result()
mixed mysql_result(resource result_set, int row [,mixed field])
从result_set 的指定row 中获取一个field 的数据. 简单但是效率低.
举例:
- $link1 = @mysql_connect("server1",
"webuser", "password") - or die("Could not connect
to mysql server!"); - @mysql_select_db("company")
or die("Could not select database!"); - $query = "select id, name
from product order by name"; - $result = mysql_query($query);
- $id = mysql_result($result, 0, "id");
- $name = mysql_result($result, 0, "name");
- mysql_close();
注意,上述代码只是输出结果集中的第一条数据的字段值,如果要输出所有记录,需要循环处理.
1 | <ol class="dp-xml"><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">for ($i = 0; $i <= mysql_num_rows($result); $i++) </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">{ </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">$id = mysql_result($result, 0, "id"); </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">$name = mysql_result($result, 0, "name"); </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">echo "Product: $name ($id)"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">} </li></ol> |
注意,如果查询字段名是别名,则mysql_result中就使用别名.
PHP获取显示数据库数据函数之mysql_fetch_row()
array mysql_fetch_row(resource result_set)
从result_set中获取整行,把数据放入数组中.
举例(注意和list 的巧妙配合):
1 | <ol class="dp-xml"><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">$query = "select id, <br />name from product order by name"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">$result = mysql_query($query); </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">while(list($id, $name) <br />= mysql_fetch_row($result)) { </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">echo "Product: $name ($id)"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">} </li></ol> |
PHP获取显示数据库数据函数之mysql_fetch_array()
array mysql_fetch_array(resource result_set [,int result_type])
mysql_fetch_row()的增强版.
将result_set的每一行获取为一个关联数组或/和数值索引数组.
默认获取两种数组,result_type可以设置:
MYSQL_ASSOC:返回关联数组,字段名=>字段值
MYSQL_NUM:返回数值索引数组.
MYSQL_BOTH:获取两种数组.因此每个字段可以按索引偏移引用,也可以按字段名引用.
举例:
1 | <ol class="dp-xml"><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">$query = "select id,<br /> name from product order by name"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">$result = mysql_query($query); </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">while($row = mysql_fetch_array<br />($result, MYSQL_BOTH)) { </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">$name = $row['name'];</li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">//或者 $name = $row[1]; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">$name = $row['id'];</li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">//或者 $name = $row[0]; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">echo "Product: $name ($id)"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">} </li></ol> |
PHP获取显示数据库数据函数之mysql_fetch_assoc()
array mysql_fetch_assoc(resource result_set)
相当于 mysql_fetch_array($result, MYSQL_ASSOC)
PHP获取显示数据库数据函数之mysql_fetch_object()
object mysql_fetch_object(resource result_set)
和mysql_fetch_array()功能一样,不过返回的不是数组,而是一个对象.
举例:
1 | <ol class="dp-xml"><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">$query = "select id, name <br />from product order by name"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">$result = mysql_query($query); </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">while($row = mysql_fetch_object<br />($result)) { </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">$name = $row->name; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">$name = $row->id; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px">echo "Product: $name ($id)"; </li><li style="padding-bottom: 0px; list-style-type: none; margin: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px" class="alt">} </li></ol> |
以上这些函数就是PHP获取显示数据库数据函数的全部总结。
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