Add a new PHP example (#54)

Author: cjbj

exadata-express/Example.php

@@ -0,0 +1,119 @@
+<?php
+
+/*----------------------------------------------------------------------
+ Example.php
+
+ Demonstrate how to perform a database insert and query with PHP
+ in Oracle Database Cloud services such as Exadata Express,
+ Autonomous Transaction Processing, Autonomous Data Warehouse, and
+ others.
+
+ Before running this script:
+ - Install PHP and the OCI8 extension
+ - Install Oracle Instant Client
+ - Download and install the cloud service wallet
+ - Modify the oci_connect() call below to use the credentials for your database.
+ See your cloud service's documentation for details.
+
+ ----------------------------------------------------------------------*/
+
+// Uncomment for testing
+// error_reporting(E_ALL); // In PHP 5.3 use E_ALL|E_STRICT
+// ini_set('display_errors', 'On');
+
+// Connect
+
+$c = oci_connect("username", "password", "connect_string");
+if (!$c) {
+ $m = oci_error();
+ trigger_error("Could not connect to database: ". $m["message"], E_USER_ERROR);
+}
+
+// Create a table
+
+$stmtarray = array(
+ "BEGIN
+ EXECUTE IMMEDIATE 'DROP TABLE mycloudtab';
+ EXCEPTION
+ WHEN OTHERS THEN
+ IF SQLCODE NOT IN (-00942) THEN
+ RAISE;
+ END IF;
+ END;",
+
+ "CREATE TABLE mycloudtab (id NUMBER, data VARCHAR2(20))"
+);
+
+foreach ($stmtarray as $stmt) {
+ $s = oci_parse($c, $stmt);
+ if (!$s) {
+ $m = oci_error($c);
+ trigger_error("Could not parse statement: ". $m["message"], E_USER_ERROR);
+ }
+ $r = oci_execute($s);
+ if (!$r) {
+ $m = oci_error($s);
+ trigger_error("Could not execute statement: ". $m["message"], E_USER_ERROR);
+ }
+}
+
+// Insert some data
+
+$data = [ [101, "Alpha" ], [102, "Beta" ], [103, "Gamma" ] ];
+
+$s = oci_parse($c, "INSERT INTO mycloudtab VALUES (:1, :2)");
+if (!$s) {
+ $m = oci_error($c);
+ trigger_error("Could not parse statement: ". $m["message"], E_USER_ERROR);
+}
+
+foreach ($data as $record) {
+ oci_bind_by_name($s, ":1", $record[0]);
+ oci_bind_by_name($s, ":2", $record[1]);
+ oci_execute($s, OCI_NO_AUTO_COMMIT); // for PHP <= 5.3.1 use OCI_DEFAULT instead
+ if (!$r) {
+ $m = oci_error($s);
+ trigger_error("Could not execute statement: ". $m["message"], E_USER_ERROR);
+ }
+}
+oci_commit($c);
+
+// Query the data
+
+$s = oci_parse($c, "SELECT * FROM mycloudtab");
+if (!$s) {
+ $m = oci_error($c);
+ trigger_error("Could not parse statement: ". $m["message"], E_USER_ERROR);
+}
+$r = oci_execute($s);
+if (!$r) {
+ $m = oci_error($s);
+ trigger_error("Could not execute statement: ". $m["message"], E_USER_ERROR);
+}
+
+echo "<table border='1'>\n";
+
+// Print column headings
+
+$ncols = oci_num_fields($s);
+echo "<tr>\n";
+for ($i = 1; $i <= $ncols; ++$i) {
+ $colname = oci_field_name($s, $i);
+ echo "<th><b>".htmlspecialchars($colname,ENT_QUOTES|ENT_SUBSTITUTE)."</b></th>\n";
+}
+echo "</tr>\n";
+
+// Print data
+
+while (($row = oci_fetch_array($s, OCI_ASSOC+OCI_RETURN_NULLS)) != false) {
+ echo "<tr>\n";
+ foreach ($row as $item) {
+ echo "<td>";
+ echo $item !== null ? htmlspecialchars($item, ENT_QUOTES|ENT_SUBSTITUTE) : "&nbsp;";
+ echo "</td>\n";
+ }
+ echo "</tr>\n";
+}
+echo "</table>\n";
+
+?>