interface example

1 files changed, 24 insertions, 0 deletions

diff --git a/oo/interface.php b/oo/interface.php
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+++ b/oo/interface.php
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+<?php
+
+/* interface contains only fixed-name declarations/stubs in with no access levels, yet it allows public,
+ * no ctors, no data members, no method definitions, no restriction on who implements this interface
+ *
+ */
+interface iDB {
+    const MAX_RECORDS = 5000;
+    public function query();
+    public function drop();
+}
+
+class MyDBDriver implements iDB {
+    public function query() {
+        echo "querying" . PHP_EOL;
+    }
+    public function drop() {
+        echo "dropping" . PHP_EOL;
+    }
+}
+
+$db = new MyDBDriver();
+$db->query() . PHP_EOL;
+$db = NULL;