12-11-2012
Do you know the max_length of the first column?
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Hi
I have a LONG ! column of text and I would like to format this into several columns.
so from this
abcd
efgh
ijkl
mnop
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i have a text file in this format:
name1^A1^B1^
name2^A2^B2^
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name1^AA1^
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name1^AAA1^BBB1^
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Hi,
i have a flat file namely temp.txt with this data below
ID|name|contact_date
101|Kay|2013-12-26
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LEARN ABOUT PHP
mysql_fetch_field
MYSQL_FETCH_FIELD(3) 1 MYSQL_FETCH_FIELD(3)
mysql_fetch_field - Get column information from a result and return as an object
SYNOPSIS
Warning
This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should
be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:
omysqli_fetch_field(3)
o PDOStatement::getColumnMeta
object mysql_fetch_field (resource $result, [int $field_offset])
DESCRIPTION
Returns an object containing field information. This function can be used to obtain information about fields in the provided query result.
o $
result -The result resource that is being evaluated. This result comes from a call to mysql_query(3).
o $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.
Returns an object containing field information. The properties of the object are:
o name - column name
o table - name of the table the column belongs to, which is the alias name if one is defined
o max_length - maximum length of the column
o not_null - 1 if the column cannot be
NULL
o primary_key - 1 if the column is a primary key
o unique_key - 1 if the column is a unique key
o multiple_key - 1 if the column is a non-unique key
o numeric - 1 if the column is numeric
o blob - 1 if the column is a BLOB
o type - the type of the column
o unsigned - 1 if the column is unsigned
o zerofill - 1 if the column is zero-filled
Example #1
mysql_fetch_field(3) 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 />
";
$meta = mysql_fetch_field($result, $i);
if (!$meta) {
echo "No information available<br />
";
}
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);
?>
Note
Field names returned by this function are case-sensitive.
Note
If field or tablenames are aliased in the SQL query the aliased name will be returned. The original name can be retrieved for
instance by using mysqli_result::fetch_field.
mysql_field_seek(3).
PHP Documentation Group MYSQL_FETCH_FIELD(3)