#118 [PHP]Getting CUBRID_SCH_CROSS_REFERENCE's value will fail when passing three parameters to cubrid_schema() method

[Jira Trac]

Test Build: CUBRID 2008 R4.1 (8.4.1.1018) (64bit release build for linux_gnu)
OS: Linux 64
Description:
Passing three parameter to cubrid_schema($conn_identifier,CUBRID_SCH_CROSS_REFERENCE, $class_name) method,
Getting value will fail.
Would parameter in the fourth place be $attr_name of cubrid_schema ( resource $conn_identifier , int $schema_type [, string $class_name [, string $attr_name ]] ) method
Would't parameter in the fourth place be $class_name of cubrid_schema()

Description in [cubrid_schema()|http://www.php.net/manual/en/function.cubrid-schema.php] method
array cubrid_schema ( resource $conn_identifier , int $schema_type [, string $class_name [, string $attr_name ]] )

if passing class_name to the third and fourth place, getting value CUBRID_SCH_CROSS_REFERENCE will success.
if passing class_name to third place and passing attr_name to fourth place ,getting value of CUBRID_SCH_CROSS_REFERENCE will fail.
if passing class_name to third place and no passing value to fourth place, getting value will fail.

Wouldn't passing class_name to the fourth place's parameter.
Would parameter in fourth place be $attr_name.

Statements in CROSS_REFERENCE_test.phpt
{noformat}
$conn = cubrid_connect(localhost, 33113, demodb,dba,);
cubrid_execute($conn,drop table if EXISTS ssss;);
cubrid_execute($conn,drop table if EXISTS aaaa;);
cubrid_execute($conn,drop table if EXISTS album;);
cubrid_execute($conn,CREATE TABLE album(id CHAR(10) primary key,title VARCHAR(100), artist VARCHAR(100)););
cubrid_execute($conn,CREATE TABLE aaaa(aid CHAR(10), uid int primary key););
cubrid_execute($conn,CREATE TABLE ssss(album CHAR(10),dsk INTEGER,FOREIGN KEY (album) REFERENCES album(id), FOREIGN KEY (dsk) REFERENCES aaaa(uid)););

print(First: \n);
$schema1 = cubrid_schema($conn,CUBRID_SCH_CROSS_REFERENCE,ssss);
var_dump($schema1);

print(\nSecond: \n);
$schema2 = cubrid_schema($conn,CUBRID_SCH_CROSS_REFERENCE,ssss,'dsk');
var_dump($schema2);

print(\nThird: \n);
$schema3 = cubrid_schema($conn,CUBRID_SCH_CROSS_REFERENCE,aaaa,ssss);
var_dump($schema3);

cubrid_disconnect($conn);

{noformat}

Actual result:
{noformat}
First:
PHP Warning: Error: CAS, -1004, Invalid argument in /home/php/phpTestcases/_01_schema/CROSS_REFERENCE_test.phpt on line 12
bool(false)

Second:
array(0) {
}

Third:
array(1) {
[0]=
array(9) {
[PKTABLE_NAME]=
string(4) aaaa
.......
}
}
{noformat}

Expect result:
Would you tell the user more detail about how to using cubrid_schema() method about CUBRID_SCH_CROSS_REFERENCE schema in cubrid php website