new functions and how to added

about serialized data and how to try to fix them

diff --git a/methods-and-how-to/repair-serialized-string.php b/methods-and-how-to/repair-serialized-string.php
new file mode 100644 (file)
index 0000000..7898d41
--- /dev/null
+++ b/methods-and-how-to/repair-serialized-string.php
@@ -0,0 +1,77 @@
+<?php
+
+/**
+ *  dolphin. Collection of useful PHP skeletons.
+ *  Copyright (C) 2013  Johannes 'Banana' Keßler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the COMMON DEVELOPMENT AND DISTRIBUTION LICENSE
+ *
+ * You should have received a copy of the
+ * COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+ * along with this program.  If not, see http://www.sun.com/cddl/cddl.html
+ */
+
+/**
+ * how to "repair" an serilized string to get the data back.
+ * it can not solve everything but it might help to recover some otherwise lost data
+ */
+
+/**
+ * the error message "Error at offset"
+ * this inticates a malformed string. with the following method you can 
+ * find out where and what could be the error
+ * At first use the exact offset from the error message and choose a length of 3
+ * then you can get backwards and choose a longer range to identify the error
+ * if you have utf-8 data, make sure you set the right encoding header.
+ */
+var_export(substr($serializedStr, OFFSET, LENGTH););
+
+/**
+ * there is a better way to store and save the data to avoid malformed data
+ */
+$toDatabse = base64_encode(serialize($data));  // Save to database
+$fromDatabase = unserialize(base64_decode($data)); //Getting Save Format
+
+/**
+ * finding the error in the serilized string.
+ * based on a idea from stackoverflow
+ *
+ * @param string The serilized string
+ */
+function findSerializeError($data1) {
+    echo "<pre>";
+    $data2 = preg_replace ( '!s:(\d+):"(.*?)";!e', "'s:'.strlen('$2').':\"$2\";'",$data1 );
+    $max = (strlen ( $data1 ) > strlen ( $data2 )) ? strlen ( $data1 ) : strlen ( $data2 );
+
+    echo $data1 . PHP_EOL;
+    echo $data2 . PHP_EOL;
+
+    for($i = 0; $i < $max; $i ++) {
+
+        if (@$data1 {$i} !== @$data2 {$i}) {
+
+            echo "Diffrence ", @$data1 {$i}, " != ", @$data2 {$i}, PHP_EOL;
+            echo "\t-> ORD number ", ord ( @$data1 {$i} ), " != ", ord ( @$data2 {$i} ), PHP_EOL;
+            echo "\t-> Line Number = $i" . PHP_EOL;
+
+            $start = ($i - 20);
+            $start = ($start < 0) ? 0 : $start;
+            $length = 40;
+
+            $point = $max - $i;
+            if ($point < 20) {
+                $rlength = 1;
+                $rpoint = - $point;
+            } else {
+                $rpoint = $length - 20;
+                $rlength = 1;
+            }
+
+            echo "\t-> Section Data1  = ", substr_replace ( substr ( $data1, $start, $length ), "<b style=\"color:green\">{$data1 {$i}}</b>", $rpoint, $rlength ), PHP_EOL;
+            echo "\t-> Section Data2  = ", substr_replace ( substr ( $data2, $start, $length ), "<b style=\"color:red\">{$data2 {$i}}</b>", $rpoint, $rlength ), PHP_EOL;
+        }
+    }
+}
+
+?>
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diff --git a/single-functions/var-dump-to-array.php b/single-functions/var-dump-to-array.php
new file mode 100644 (file)
index 0000000..5053f05
--- /dev/null
+++ b/single-functions/var-dump-to-array.php
@@ -0,0 +1,79 @@
+<?php
+
+/**
+ *  dolphin. Collection of useful PHP skeletons.
+ *  Copyright (C) 2013  Johannes 'Banana' Keßler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the COMMON DEVELOPMENT AND DISTRIBUTION LICENSE
+ *
+ * You should have received a copy of the
+ * COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+ * along with this program.  If not, see http://www.sun.com/cddl/cddl.html
+ */
+
+
+/**
+ * can return the output of var_dump() into a variable.
+ * nested and complex strutures are supported.
+ * based on an idea from stackoverflow 
+ *
+ * @param string The output of var_dump()
+ */
+function var_dump_to_variable($str) {
+
+       if (strpos($str, "\n") === false) {
+               //Add new lines:
+               $regex = array(
+                               '#(\\[.*?\\]=>)#',
+                               '#(string\\(|int\\(|float\\(|array\\(|NULL|object\\(|})#',
+               );
+               $str = preg_replace($regex, "\n\\1", $str);
+               $str = trim($str);
+       }
+       $regex = array(
+                       '#^\\040*NULL\\040*$#m',
+                       '#^\\s*array\\((.*?)\\)\\s*{\\s*$#m',
+                       '#^\\s*string\\((.*?)\\)\\s*(.*?)$#m',
+                       '#^\\s*int\\((.*?)\\)\\s*$#m',
+                       '#^\\s*float\\((.*?)\\)\\s*$#m',
+                       '#^\\s*\[(\\d+)\\]\\s*=>\\s*$#m',
+                       '#\\s*?\\r?\\n\\s*#m',
+       );
+       $replace = array(
+                       'N',
+                       'a:\\1:{',
+                       's:\\1:\\2',
+                       'i:\\1',
+                       'd:\\1',
+                       'i:\\1',
+                       ';'
+       );
+       $serialized = preg_replace($regex, $replace, $str);
+       $func = create_function(
+                       '$match',
+                       'return "s:".strlen($match[1]).":\\"".$match[1]."\\"";'
+       );
+       $serialized = preg_replace_callback(
+                       '#\\s*\\["(.*?)"\\]\\s*=>#',
+                       $func,
+                       $serialized
+       );
+       $func = create_function(
+                       '$match',
+                       'return "O:".strlen($match[1]).":\\"".$match[1]."\\":".$match[2].":{";'
+       );
+       $serialized = preg_replace_callback(
+                       '#object\\((.*?)\\).*?\\((\\d+)\\)\\s*{\\s*;#',
+                       $func,
+                       $serialized
+       );
+       $serialized = preg_replace(
+                       array('#};#', '#{;#'),
+                       array('}', '{'),
+                       $serialized
+       );
+
+       return unserialize($serialized);
+}
+?>
\ No newline at end of file