json_validate()

json_validate() — Checks if a string contains valid JSON.

Returns whether the given string is syntactically valid JSON. If json_validate returns true, json_decode will successfully decode the given string when using the same depth and flags.

If json_validate returns false, the cause can be retrieved using json_last_error and json_last_error_msg.

json_validate uses less memory than json_decode if the decoded JSON payload is not used, because it does not need to build the array or object structure containing the payload.

Inputs: json: The string to validate. This function only works with UTF-8 encoded strings. depth: Maximum nesting depth of the structure being decoded. The value must be greater than 0, and less than or equal to 2147483647. flags: Currently only JSON_INVALID_UTF8_IGNORE is accepted.

Returns: Returns true if the given string is syntactically valid JSON, otherwise returns false.