PHP 5.5.16 is released

oci_parse

(PHP 5, PECL OCI8 >= 1.1.0)

oci_parsePrepares an Oracle statement for execution

Descrizione

resource oci_parse ( resource $connection , string $sql_text )

Prepares sql_text using connection and returns the statement identifier, which can be used with oci_bind_by_name(), oci_execute() and other functions.

Statement identifiers can be freed with oci_free_statement() or by setting the variable to NULL.

Elenco dei parametri

connection

An Oracle connection identifier, returned by oci_connect(), oci_pconnect(), or oci_new_connect().

sql_text

The SQL or PL/SQL statement.

SQL statements should not end with a semi-colon (";"). PL/SQL statements should end with a semi-colon (";").

Valori restituiti

Returns a statement handle on success, or FALSE on error.

Esempi

Example #1 oci_parse() example for SQL statements

<?php

$conn 
oci_connect('hr''welcome''localhost/XE');

// Parse the statement. Note there is no final semi-colon in the SQL statement
$stid oci_parse($conn'SELECT * FROM employees');
oci_execute($stid);

echo 
"<table border='1'>\n";
while (
$row oci_fetch_array($stidOCI_ASSOC+OCI_RETURN_NULLS)) {
    echo 
"<tr>\n";
    foreach (
$row as $item) {
        echo 
"    <td>" . ($item !== null htmlentities($itemENT_QUOTES) : "&nbsp;") . "</td>\n";
    }
    echo 
"</tr>\n";
}
echo 
"</table>\n";

?>

Example #2 oci_parse() example for PL/SQL statements

<?php

/*
  Before running the PHP program, create a stored procedure in
  SQL*Plus or SQL Developer:

  CREATE OR REPLACE PROCEDURE myproc(p1 IN NUMBER, p2 OUT NUMBER) AS
  BEGIN
      p2 := p1 * 2;
  END;

*/

$conn oci_connect('hr''welcome''localhost/XE');
if (!
$conn) {
    
$e oci_error();
    
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}

$p1 8;

// When parsing PL/SQL programs, there should be a final semi-colon in the string
$stid oci_parse($conn'begin myproc(:p1, :p2); end;');
oci_bind_by_name($stid':p1'$p1);
oci_bind_by_name($stid':p2'$p240);

oci_execute($stid);

print 
"$p2\n";   // prints 16

oci_free_statement($stid);
oci_close($conn);

?>

Note

Nota:

This function does not validate sql_text. The only way to find out if sql_text is a valid SQL or PL/SQL statement is to execute it.

Vedere anche:

add a note add a note

User Contributed Notes 4 notes

up
1
kurt at kovac dot ch
10 years ago
For those that are having trouble with error checking, i have noticed on a lot of sites that people are trying to check the statement handle for error messages with OCIParse. Since the statement handle ($sth) is not created yet, you need to check the database handle ($dbh) for any errors with OCIParse. For example:

instead of:

<?php
$stmt
= OCIParse($conn, $query);
if (!
$stmt) {
  
$oerr = OCIError($stmt);
   echo
"Fetch Code 1:".$oerr["message"];
   exit;
}
?>

use:

<?php
$stmt
= OCIParse($conn, $query);
if (!
$stmt) {
  
$oerr = OCIError($conn);
   echo
"Fetch Code 1:".$oerr["message"];
   exit;
}
?>

Hope this helps someone.
up
1
egypt at nmt dot edu
10 years ago
Whereas MySQL doesn't care what kind of quotes are around a LIKE clause, ociexecute gives the error:
    ociexecute(): OCIStmtExecute: ORA-00904: "NM": invalid identifier
for the following.
<?php
$sql 
= "SELECT * FROM addresses "
     
. "WHERE state LIKE \"NM\""// error!
$stmt = ociparse($conn, $sql);
ociexecute($stmt);
?>

it's fine if you just use single quotes:
    . "WHERE state LIKE 'NM'";
but i think it's interesting that ociparse doesn't say anything
up
0
falundir at gmail dot com
3 years ago
When you want to call stored function (and want to read its result) which executes DML queries (insert, update, delete) inside its body you can't use "select your_stored_function(:param1, :param2) from dual" because you will receive "ORA-14551: cannot perform a DML operation inside a query" error.

In order to call such function and get its result you need to wrap it into nested procedure with OUT parameter like this:

DECLARE
  PROCEDURE caller(return_value OUT NUMBER) AS
  BEGIN
    return_value := your_stored_function(:param1, :param2);
  END;
BEGIN
  caller(:return_value);
END;

and bind to :return_value variable to get the result of function.
up
0
michael dot virnstein at brodos dot de
6 years ago
A neat way to parse a query only once per script, if the query is done inside a function:

<?php
function querySomething($conn, $id)
{
    static
$stmt;

    if (
is_null($stmt)) {
       
$stmt = oci_parse($conn, 'select * from t where pk = :id');
    }

   
oci_bind_by_name($stmt, ':id', $id, -1);

   
oci_execute($stmt, OCI_DEFAULT);

    return
oci_fetch_array($stmt, OCI_ASSOC);

}

?>

With the static variable, the statment handle isn't closed after the function has terminated. Very nice for functions that are called e.g. in loops. Unfortunately this only works for static sql. If you have dynamic sql, you can do the following:

<?php

function querySomething($conn, $data)
{
    static
$stmt = array();
   
   
$first = true;
   
   
$query = 'select * from t';

    foreach (
$data as $key => $value) {
        if (
$first) {
           
$first = false;
           
$query .= ' where ';
        } else {
           
$query .= ' and ';
        }
       
       
$query .= "$key = :b$key";
    }
   
   
$queryhash = md5($query);
  
    if (
is_null($stmt[$queryhash])) {
       
$stmt[$queryhash] = oci_parse($conn, $query);   
    }

    foreach (
$data as $key => $value) {
       
// don't use $value, because we bind memory addresses here.
        // this would result in every bind pointing at the same value after foreach
       
oci_bind_by_name($stmt[$queryhash], ":b$key", $data[$key], -1);
    }
   
   
oci_execute($stmt[$queryhash], OCI_DEFAULT);

    return
oci_fetch_array($stmt[$queryhash], OCI_ASSOC);

}

?>
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