Description:
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The PDO OCI driver converts OCI_SUCCESS_WITH_INFO errors to exceptions which makes it impossible to connect to the server when the user's password is about to expire but is still valid.

A similar issue was fixed earlier in the oci8 extension: https://bugs.php.net/bug.php?id=31623

Create a test user in SQLPlus:

> CREATE PROFILE test_profile LIMIT PASSWORD_LIFE_TIME 0.001 PASSWORD_GRACE_TIME 0.001;
> CREATE USER bob IDENTIFIED BY password PROFILE test_profile;
> GRANT CREATE SESSION TO bob;

Run the following PHP script:

Test script:
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$conn = new PDO('oci:dbname=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SID=XE)))', 'bob', 'password');

Expected result:
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The connection is successfully established

Actual result:
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PDOException: SQLSTATE[HY000]: OCISessionBegin: OCI_SUCCESS_WITH_INFO: ORA-28002: the password will expire within 0 days
 (ext/pdo_oci/oci_driver.c:685) in test.php on line 3

Call Stack:
    0.0001     394880   1. {main}() test.php:0
    0.0001     395176   2. PDO->__construct() test.php:3