adding serialization methods and versions to docblocks in helpers

src/helpers/global_functions.php

@@ -5,6 +5,8 @@ if (! function_exists('snake2Title')) {
      * Convert a snake case string to a title with spaces
      * and every word capitalized.
      *
+     * @since 1.0.0
+     *
      * @param string $stakeSlug A snake case string, commonly a slug
      *
      * @return string
@@ -22,6 +24,8 @@ if (! function_exists('carbon')) {
      * It will attempt to find a timezone in the current
      * session but default to UTC.
      *
+     * @since 1.0.0
+     *
      * @param string|null $timestring
      *
      * @return \Carbon\Carbon
@@ -40,6 +44,8 @@ if (! function_exists('jddayofweek')) {
     /**
      * Returns the day of the week. Can return a string or an integer depending on the mode.
      *
+     * @since 1.0.0
+     *
      * @param int|null $intDay
      * @param int $mode
      *
@@ -59,10 +65,106 @@ if (! function_exists('jddayofweek')) {
     }
 }
 
+if (! function_exists('is_serialized')) {
+    /**
+     * Check a value to find if it was serialized.
+     *
+     * @since 1.0.0
+     *
+     * @param mixed $data
+     * @param bool $strict
+     *
+     * @return bool
+     */
+    function is_serialized($data, bool $strict = true): bool
+    {
+        // If it isn't a string, it isn't serialized.
+        if (! is_string($data)) {
+            return false;
+        }
+
+        $data = trim($data);
+        if ('N;' === $data) {
+            return true;
+        }
+        if (strlen($data) < 4) {
+            return false;
+        }
+        if (':' !== $data[1]) {
+            return false;
+        }
+        if ($strict) {
+            $lastc = substr($data, -1);
+            if (';' !== $lastc && '}' !== $lastc) {
+                return false;
+            }
+        } else {
+            $semicolon = strpos($data, ';');
+            $brace     = strpos($data, '}');
+            // Either ; or } must exist.
+            if (!$semicolon && !$brace) {
+                return false;
+            }
+            // But neither must be in the first X characters.
+            if ($semicolon && $semicolon < 3) {
+                return false;
+            }
+            if ($brace && $brace < 4) {
+                return false;
+            }
+        }
+        $token = $data[0];
+        switch ($token) {
+            case 's':
+                if ($strict) {
+                    if ('"' !== substr($data, -2, 1)) {
+                        return false;
+                    }
+                } elseif (!strpos($data, '"')) {
+                    return false;
+                }
+                // Or else fall through.
+            case 'a':
+            case 'O':
+                return (bool) preg_match("/^{$token}:[0-9]+:/s", $data);
+            case 'b':
+            case 'i':
+            case 'd':
+                $end = $strict ? '$' : '';
+                return (bool) preg_match("/^{$token}:[0-9.E+-]+;$end/", $data);
+        }
+        return false;
+    }
+}
+
+if (! function_exists('maybe_unserialize')) {
+    /**
+     * Unserialize data only if it was serialized. Will return
+     * an array if it was a serialized string, otherwise it
+     * will return whatever was passed into the function
+     * leaving it untouched.
+     *
+     * @since 1.0.0
+     *
+     * @param mixed $data
+     *
+     * @return mixed
+     */
+    function maybe_unserialize($data)
+    {
+        if (is_serialized($data)) { // Don't attempt to unserialize data that wasn't serialized going in.
+            return @unserialize(trim($data));
+        }
+        return $data;
+    }
+}
+
 if (! function_exists('cel2Fah')) {
     /**
      * Convert from celsius to fahrenheit.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $celsius
      * @param int $precision
      *
@@ -78,6 +180,8 @@ if (! function_exists('fah2Cel')) {
     /**
      * Convert from fahrenheit to celsius.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $fahrenheit
      * @param int $precision
      *
@@ -93,6 +197,8 @@ if (! function_exists('meters2Miles')) {
     /**
      * Convert from meters to miles.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $meters
      * @param int $precision
      *
@@ -108,6 +214,8 @@ if (! function_exists('kilometers2Miles')) {
     /**
      * Convert from kilometers to meters.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $kilometers
      * @param int $precision
      *
@@ -123,6 +231,8 @@ if (! function_exists('m2Km')) {
     /**
      * Convert from meters to kilometers.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $meters
      * @param int $precision
      *
@@ -138,6 +248,8 @@ if (! function_exists('mm2Inches')) {
     /**
      * Convert from milimeters to inches.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $milimeters
      * @param int $precision
      *
@@ -153,6 +265,8 @@ if (! function_exists('pa2Mbar')) {
     /**
      * Convert from pascals to milibars.
      *
+     * @since 1.0.0
+     *
      * @param float|int|string $pascals
      * @param int $precision
      *