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system/Entity/Cast/JsonCast.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Entity\Cast;
+
+use CodeIgniter\Entity\Exceptions\CastException;
+use JsonException;
+use stdClass;
+
+/**
+ * Class JsonCast
+ */
+class JsonCast extends BaseCast
+{
+    /**
+     * {@inheritDoc}
+     */
+    public static function get($value, array $params = [])
+    {
+        $associative = in_array('array', $params, true);
+
+        $tmp = $value !== null ? ($associative ? [] : new stdClass()) : null;
+
+        if (function_exists('json_decode')
+            && (
+                (is_string($value)
+                    && strlen($value) > 1
+                    && in_array($value[0], ['[', '{', '"'], true))
+                || is_numeric($value)
+            )
+        ) {
+            try {
+                $tmp = json_decode($value, $associative, 512, JSON_THROW_ON_ERROR);
+            } catch (JsonException $e) {
+                throw CastException::forInvalidJsonFormat($e->getCode());
+            }
+        }
+
+        return $tmp;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public static function set($value, array $params = []): string
+    {
+        if (function_exists('json_encode')) {
+            try {
+                $value = json_encode($value, JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR);
+            } catch (JsonException $e) {
+                throw CastException::forInvalidJsonFormat($e->getCode());
+            }
+        }
+
+        return $value;
+    }
+}