Add PHP OPcache plugin

plugins/php/php_opcache

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+#!/bin/sh
+###############################################################################
+#
+# Munin plugin to monitor Zend OPCache <http://php.net/manual/en/book.opcache.php>
+# By Daniel Lo Nigro <http://dan.cx/>
+#
+# Installation:
+#  1. Copy php_opcache.php file onto server and verify you can hit it in a browser
+#  2. Add to Munin config:
+# [php_opcache]
+# env.URL http://example/php_opcache.php
+###############################################################################
+# Settigs required for autoconf
+#%# family=auto
+#%# capabilities=autoconf suggest
+
+URL=${URL:-'http://localhost/php_opcache.php'}
+
+WGET=`which wget`;
+WGET_FLAGS="-Yoff"; # refer to wget manual, you may set extra parameters like disable proxy
+act=memory
+
+if [ "$1" = "autoconf" ]; then
+        [ -z "$URL" ] && echo "no (edit URL config in header file !)" && exit 1
+        [ -n "$URL" ] && echo "yes" && exit 0
+fi
+
+if [ "$1" = "suggest" ]; then
+        echo "memory"
+        exit 0
+fi
+
+if [ "$1" = "config" ] && [ "$act" = "memory" ]; then
+
+cat <<'EOM'
+graph_title OPCache Memory usage
+graph_args -l 0 --base 1024
+graph_vlabel Memory usage
+graph_category nginx
+graph_order mem_used mem_free
+graph_total Total
+mem_free.label Memory Free
+mem_free.draw STACK
+mem_free.min 0
+mem_used.label Memory Used
+mem_used.draw AREA
+mem_used.min 0
+EOM
+
+exit 0
+fi
+
+###############################################################################
+
+[ -x $WGET ] && $WGET -q $WGET_FLAGS "$URL?act=$act" -O - && exit 0
+
+exit 1
+

plugins/php/php_opcache.php

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+<?php
+/**
+ * Part of Munin PHP OPcache plugin - Refer to php_opcache for installation instructions.
+ */
+
+if (function_exists('opcache_get_status')) 
+{
+	$data = opcache_get_status();
+	$output = array(
+		'mem_used.value' => $data['memory_usage']['used_memory'],
+		'mem_free.value' => $data['memory_usage']['free_memory'],
+	);
+}
+else
+{
+	// OPCache not installed :(
+	$output = array(
+		'mem_used.value' => 0,
+		'mem_free.value' => 0,
+	);
+}
+
+header('Content-Type: text/plain');
+foreach ($output as $key => $value)
+{
+        echo $key, ' ', $value, "\n";
+}
+?>