Added script to detect unused language variables - found around 2400 for a total of 7700 variables currently managed. Conclusion: we could considerably reduce the load on new translators! - refs #4804

main/cron/lang/list_unused_langvars.php

@@ -0,0 +1,103 @@
+<?php /* For licensing terms, see /license.txt */
+/**
+ * Cron script to list unused, but defined, language variables
+ * @package chamilo.cron.lang
+ */
+/**
+ * Includes and declarations
+ */
+//if (PHP_SAPI!='cli') { die('Run this script through the command line or comment this line in the code'); }
+require_once '../../inc/global.inc.php';
+require_once api_get_path(SYS_CODE_PATH).'admin/sub_language.class.php';
+$path = api_get_path(SYS_LANG_PATH).'english';
+ini_set('memory_limit','128M');
+/**
+ * Main code
+ */
+$terms = array();
+$list = SubLanguageManager::get_lang_folder_files_list($path);
+foreach ($list as $entry) {
+  $file = $path.'/'.$entry;
+  if (is_file($file)) {
+    $terms = array_merge($terms,SubLanguageManager::get_all_language_variable_in_file($file,true));
+  }
+}
+// get only the array keys (the language variables defined in language files)
+$defined_terms = array_flip(array_keys($terms));
+$terms = null;
+echo count($defined_terms)." terms were found in language files<br />";
+
+// now get all terms found in all PHP files of Chamilo (this takes some 
+// time and memory)
+$used_terms = array();
+$l = strlen(api_get_path(SYS_PATH));
+$files = get_all_php_files(api_get_path(SYS_PATH));
+// Browse files
+foreach ($files as $file) {
+  //echo 'Analyzing '.$file."<br />";
+  $shortfile = substr($file,$l);
+  //echo 'Analyzing '.$shortfile."<br />";
+  $lines = file($file);
+  // Browse lines inside file $file
+  foreach ($lines as $line) {
+    $myterms = array();
+    $res = preg_match_all('/get_lang\(\'(\\w*)\'\)/',$line,$myterms);
+    if ($res > 0) {
+      foreach($myterms[1] as $term) {
+        if (substr($term,0,4)=='lang') { $term = substr($term,4); }
+        $used_terms[$term] = $shortfile;
+      }
+    } else {
+      $res = 0;
+      $res = preg_match_all('/\{[\'"](\\w*)[\'"]\|get_lang\}/',$line,$myterms);
+      if ($res > 0) {
+        foreach($myterms[1] as $term) {
+          if (substr($term,0,4)=='lang') { $term = substr($term,4); }
+          $used_terms[$term] = $shortfile;
+        }
+      }
+    }
+  }
+  flush();
+}
+
+// Compare defined terms VS used terms. Used terms should be smaller than
+// defined terms, and this should prove the concept that there are much
+// more variables than what we really use
+if (count($used_terms)<1) { 
+  die("No used terms<br />\n"); 
+} else {
+  echo "The following terms were defined but never used: <br />\n<table>"; 
+}
+$i = 1;
+foreach ($defined_terms as $term => $file) {
+  // remove "lang" prefix just in case
+  if (substr($term,0,4)=='lang') { $term = substr($term,4); }
+  if (!isset($used_terms[$term])) {
+    echo "<tr><td>$i</td><td>$term</td></tr>\n";
+    $i++;
+  }
+}
+echo "</table>\n";
+
+
+function get_all_php_files($base_path) {
+    $list = scandir($base_path);
+    $files = array();
+    foreach ($list as $item) {
+    	if (substr($item,0,1)=='.') {continue;}
+        $special_dirs = array(api_get_path(SYS_TEST_PATH),api_get_path(SYS_COURSE_PATH),api_get_path(SYS_LANG_PATH),api_get_path(SYS_ARCHIVE_PATH));
+        if (in_array($base_path.$item.'/',$special_dirs)) {continue;}
+        if (is_dir($base_path.$item)) {
+        	$files = array_merge($files,get_all_php_files($base_path.$item.'/'));
+        } else {
+            //only analyse php files
+                $sub = substr($item,-4);
+        	if ($sub == '.php' or $sub == '.tpl') {
+                    $files[] = $base_path.$item;
+        	}
+        } 
+    }
+    $list = null;
+    return $files;
+}