yaz_record
(PHP 4 >= 4.0.1, PECL yaz:0.9-1.0.9) yaz_record — Returns a record
Description
string yaz_record
( resource $id
, int $pos
, string $type
)
Parameters
-
id
-
The connection resource returned by yaz_connect().
-
pos
-
The record position. Records positions in a result set are numbered 1,
2, ... $hits where $hits is the count returned by yaz_hits().
-
type
-
The type
specifies the form of the
returned record.
Note:
It is the application which is responsible for actually
ensuring that the records are returned from the Z39.50/SRW server
in the proper format. The type given only specifies a conversion
to take place on the client side (in PHP/YAZ).
Besides conversion of the transfer record to a string/array, PHP/YAZ
it is also possible to perform a character set conversion of the
record. Especially for USMARC/MARC21 that is recommended since
these are typically returned in the character set MARC-8 that is
not supported by browsers, etc. To specify a conversion, add
; charset=from,
to where
from is the original character set
of the record and to is the resulting character
set (as seen by PHP).
-
string
-
The record is returned as a string for simple display.
In this mode, all MARC records are converted to a line-by-line format
since ISO2709 is hardly readable.
XML records and SUTRS are returned in their original format.
GRS-1 are returned in a (ugly) line-by-line format.
This format is suitable if records are to be displayed in a quick
way - for debugging - or because it is not feasible to perform
proper display.
-
xml
-
The record is returned as an XML string if possible.
In this mode, all MARC records are converted to
» MARCXML.
XML records and SUTRS are returned in their original format.
GRS-1 is not supported.
This format is similar to string
except that
MARC records are converted to MARCXML
This format is suitable if records are processed by an XML parser
or XSLT processor afterwards.
-
raw
-
The record is returned as a string in its original form.
This type is suitable for MARC, XML and SUTRS. It does not
work for GRS-1.
MARC records are returned as a ISO2709 string. XML and SUTRS are
returned as strings.
-
syntax
-
The syntax of the record is returned as a string, i.e.
USmarc, GRS-1,
XML, etc.
-
database
-
The name of database associated with record at the position
is returned as a string.
-
array
-
The record is returned as an array that reflects the GRS-1
structure. This type is suitable for MARC and GRS-1. XML, SUTRS
are not supported and if the actual record is XML or SUTRS an
empty string will be returned.
The array returned consists of a list corresponding to
each leaf/internal node of GRS-1. Each list item consists
a sub list with first element path and
data (if data is available).
The path which is a string holds a list of each tree component (of
the structured GRS-1 record) from root to leaf. Each component is
a tag type, tag value pair of the form
(type,
value
String tags normally has a corresponding tag type 3.
MARC can also be returned as an array (they are converted to
GRS-1 internally).
Return Values
Returns the record at position pos
or an empty
string if no record exists at the given position.
If no database record exists at the given position an empty string is
returned.
Examples
Example #1 Array for GRS-1 record
Consider this GRS-1 record:
(4,52)Robert M. Pirsig
(4,70)
(4,90)
(2,7)Transworld Publishers, ltd.
This record has two nodes at root level. First element at root level is
(4,52) [tag type 4, tag value 52], and has data Robert M.
Pirsig. Second element at root level (4,70) has a subtree with
a single element (4,90). (4,90) has yet another sub tree (2,7) with data
Transworld Publishers, ltd..
If this record is present at position $p, then
<?php
$ar = yaz_record($id, $p, "array");
print_r($ar);
?>
will output:
Array
(
[0] => Array
(
[0] => (4,52)
[1] => Robert M. Pirsig
)
[1] => Array
(
[0] => (4,70)
)
[2] => Array
(
[0] => (4,70)(4,90)
)
[3] => Array
(
[0] => (4,70)(4,90)(2,7)
[1] => Transworld Publishers, ltd.
)
)
Example #2 Working with MARCXML
The following PHP snippet returns a MARC21/USMARC record as MARCXML.
The original record is returned in marc-8 (unknown to most XML parsers),
so we convert it to UTF-8 (which all XML parsers must support).
<?php
$rec = yaz_record($id, $p, "xml; charset=marc-8,utf-8");
?>
The record $rec can be processed with the
Sablotron XSLT processor as follows:
<?php
$xslfile = 'display.xsl';
$processor = xslt_create();
$parms = array('/_xml' => $rec);
$res = xslt_process($processor, 'arg:/_xml', $xslfile, NULL, $parms);
xslt_free($processor);
$res = preg_replace("'</?html[^>]*>'", '', $res);
echo $res;
?>
For PHP 5 the XSL extension must be used
instead of Sablotron XSLT.
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