php globals: try few exmaples

3 files changed, 30 insertions, 0 deletions

diff --git a/global_from-func-to-global.php b/global_from-func-to-global.php
new file mode 100644
index 0000000..94d3f81
--- /dev/null
+++ b/global_from-func-to-global.php
@@ -0,0 +1,10 @@
+<?php
+
+function foo() {
+    global $foo;
+    $foo = 'bar';
+}
+
+foo();
+// prints 'bar'
+echo $foo;
diff --git a/global_vars.php b/global_vars.php
new file mode 100644
index 0000000..bf86e98
--- /dev/null
+++ b/global_vars.php
@@ -0,0 +1,4 @@
+<?php
+
+$fruit = 'apple';
+$color = 'green';
diff --git a/globals.php b/globals.php
new file mode 100644
index 0000000..ade8d6d
--- /dev/null
+++ b/globals.php
@@ -0,0 +1,16 @@
+<?php
+/*
+ *
+ */
+
+function foo() {
+    // when a file is included, the code it contains inherits the variable scope of the line on which the include occurs
+    include 'global_vars.php';
+    echo $color;
+}
+
+// prints green
+foo();
+
+// undefined
+echo $color;