锟接斤拷锟斤拷锟斤拷锟饺★拷锟斤拷锟斤拷锟较拷锟斤拷锟轿拷锟斤拷蠓祷锟�

说锟斤拷

mysql_fetch_field ( resource $result [, int $field_offset ] ) : object

锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟街讹拷锟斤拷息锟侥讹拷锟斤拷

mysql_fetch_field() 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷某锟斤拷锟斤拷询锟斤拷锟斤拷锟饺★拷锟斤拷侄蔚锟斤拷锟较拷锟斤拷锟斤拷没锟斤拷指锟斤拷锟街讹拷偏锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷未锟斤拷 mysql_fetch_field() 取锟矫碉拷锟街段憋拷锟斤拷取锟斤拷

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name - 锟斤拷锟斤拷
table - 锟斤拷锟斤拷锟斤拷锟节的憋拷锟斤拷
max_length - 锟斤拷锟斤拷锟斤拷蟪ざ锟�
not_null - 1锟斤拷锟斤拷锟斤拷锟斤拷胁锟斤拷锟轿� NULL
primary_key - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� primary key
unique_key - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� unique key
multiple_key - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� non-unique key
numeric - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� numeric
blob - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� BLOB
type - 锟斤拷锟叫碉拷锟斤拷锟斤拷
unsigned - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷薹锟斤拷锟斤拷锟�
zerofill - 1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� zero-filled

Note: 锟剿猴拷锟斤拷锟斤拷锟截碉拷锟街讹拷锟斤拷锟斤拷小写锟斤拷锟斤拷锟斤拷

Example #1 mysql_fetch_field()


<?php
mysql_connect('localhost:3306', $user, $password)
    or die("Could not connect: " . mysql_error());
mysql_select_db("database");
$result = mysql_query("select * from table")
    or die("Query failed: " . mysql_error());
/* get column metadata */
$i = 0;
while ($i < mysql_num_fields($result)) {
    echo "Information for column $i:<br />\n";
    $meta = mysql_fetch_field($result);
    if (!$meta) {
        echo "No information available<br />\n";
    }
    echo "<pre>
blob:         $meta->blob
max_length:   $meta->max_length
multiple_key: $meta->multiple_key
name:         $meta->name
not_null:     $meta->not_null
numeric:      $meta->numeric
primary_key:  $meta->primary_key
table:        $meta->table
type:         $meta->type
unique_key:   $meta->unique_key
unsigned:     $meta->unsigned
zerofill:     $meta->zerofill
</pre>";
    $i++;
}
mysql_free_result($result);
?>

锟轿硷拷 mysql_field_seek()锟斤拷

锟斤拷锟斤拷

result: resource 锟酵的斤拷锟斤拷锟斤拷锟斤拷私锟斤拷锟斤拷锟斤拷锟皆讹拷 mysql_query() 锟侥碉拷锟矫★拷
field_offset: The numerical field offset. If the field offset is not specified, the next field that was not yet retrieved by this function is retrieved. The field_offset starts at 0.

锟斤拷锟斤拷值

Returns an object containing field information. The properties of the object are:

name - column name
table - name of the table the column belongs to
max_length - maximum length of the column
not_null - 1 if the column cannot be NULL
primary_key - 1 if the column is a primary key
unique_key - 1 if the column is a unique key
multiple_key - 1 if the column is a non-unique key
numeric - 1 if the column is numeric
blob - 1 if the column is a BLOB
type - the type of the column
unsigned - 1 if the column is unsigned
zerofill - 1 if the column is zero-filled

锟斤拷锟斤拷

Example #2 mysql_fetch_field() example


<?php
$conn = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$conn) {
    die('Could not connect: ' . mysql_error());
}
mysql_select_db('database');
$result = mysql_query('select * from table');
if (!$result) {
    die('Query failed: ' . mysql_error());
}
/* get column metadata */
$i = 0;
while ($i < mysql_num_fields($result)) {
    echo "Information for column $i:<br />\n";
    $meta = mysql_fetch_field($result, $i);
    if (!$meta) {
        echo "No information available<br />\n";
    }
    echo "<pre>
blob:         $meta->blob
max_length:   $meta->max_length
multiple_key: $meta->multiple_key
name:         $meta->name
not_null:     $meta->not_null
numeric:      $meta->numeric
primary_key:  $meta->primary_key
table:        $meta->table
type:         $meta->type
unique_key:   $meta->unique_key
unsigned:     $meta->unsigned
zerofill:     $meta->zerofill
</pre>";
    $i++;
}
mysql_free_result($result);
?>

注锟斤拷

Note: 锟剿猴拷锟斤拷锟斤拷锟截碉拷锟街讹拷锟斤拷锟斤拷小写锟斤拷锟斤拷锟斤拷

锟轿硷拷

mysql_field_seek() - 锟斤拷锟斤拷锟斤拷锟斤拷械锟街革拷锟斤拷瓒ㄎ拷贫锟斤拷锟斤拷侄锟狡拷锟斤拷锟�