file :show max upload size

fix #101

1 files changed, 36 insertions, 0 deletions

diff --git a/app/fn/fn.php b/app/fn/fn.php
index 103062a..e0e5f47 100644
--- a/app/fn/fn.php
+++ b/app/fn/fn.php
@@ -433,3 +433,39 @@ function accessfile(string $path, bool $createdir = false): bool
         return false;
     }
 }
+
+// Returns a file size limit in bytes based on the PHP upload_max_filesize
+// and post_max_size
+function file_upload_max_size()
+{
+    static $max_size = -1;
+  
+    if ($max_size < 0) {
+      // Start with post_max_size.
+        $post_max_size = parse_size(ini_get('post_max_size'));
+        if ($post_max_size > 0) {
+            $max_size = $post_max_size;
+        }
+  
+      // If upload_max_size is less, then reduce. Except if upload_max_size is
+      // zero, which indicates no limit.
+        $upload_max = parse_size(ini_get('upload_max_filesize'));
+        if ($upload_max > 0 && $upload_max < $max_size) {
+            $max_size = $upload_max;
+        }
+    }
+    return $max_size;
+}
+  
+function parse_size($size)
+{
+    $unit = preg_replace('/[^bkmgtpezy]/i', '', $size); // Remove the non-unit characters from the size.
+    $size = preg_replace('/[^0-9\.]/', '', $size); // Remove the non-numeric characters from the size.
+    $size = floatval($size);
+    if ($unit) {
+      // Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.
+        return round($size * pow(1024, stripos('bkmgtpezy', $unit[0])));
+    } else {
+        return round($size);
+    }
+}