How Can I Prevent `json_encode()` From Escaping Forward Slashes in PHP?

json_encode() Escaping Forward Slashes

When decoding JSON from Instagram, it's common to encounter forward slashes being escaped upon re-encoding and caching the data. This is due to json_encode() automatically escaping forward slashes by default.

Disabling Forward Slash Escaping

Fortunately, PHP 5.4 offers a solution to disable this escaping behavior using the JSON_UNESCAPED_SLASHES flag. Here's how to use it:

json_encode($data, JSON_UNESCAPED_SLASHES);

By setting this flag, json_encode() will retain forward slashes unescaped.

Caution for Web/HTML Context

It's crucial to note that disabling forward slash escaping in a web/HTML context (e.g., serving JSON data to a browser) can introduce security vulnerabilities. Escaped slashes are essential to prevent cross-site scripting (XSS) attacks. Therefore, the use of JSON_UNESCAPED_SLASHES should be carefully considered in such scenarios.

For PHP Versions Prior to 5.4

If you're using PHP versions prior to 5.4, you can modify existing functions like json_encode_no_backslashes() (available at https://snippets.dzone.com/posts/show/7487) to suit your needs.

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