PHP JSON- functies
PHP JSON Introductie
De JSON-extensie implementeert de JavaScript Object Notation-gegevensuitwisselingsindeling.
In PHP 5 wordt de decodering afgehandeld door een parser op basis van de JSON_checker van Douglas Crockford.
PHP 7 heeft een nieuwe en verbeterde parser die speciaal is geschreven voor PHP en is gelicentieerd onder de PHP-licentie.
Installatie
Vanaf PHP 5.2.0 zijn de JSON-functies standaard ingeschakeld. Er is geen installatie nodig om deze functies te gebruiken.
PHP JSON-functies
| Function | Description |
|---|---|
| json_decode() | Decodes a JSON string |
| json_encode() | Encode a value to JSON format |
| json_last_error() | Returns the last error occurred |
| json_last_error_msg() | Returns the error string of the last json_encode() or json_decode() call |
PHP Voorgedefinieerde JSON-constanten
| Constant | Type | Description |
|---|---|---|
| JSON_ERROR_NONE | Integer | No error has occurred |
| JSON_ERROR_DEPTH | Integer | Maximum stack depth has been exceeded |
| JSON_ERROR_STATE_MISMATCH | Integer | Invalid/Malformed JSON |
| JSON_ERROR_CTRL_CHAR | Integer | Control character error |
| JSON_ERROR_SYNTAX | Integer | Syntax error |
| JSON_ERROR_UTF8 | Integer | Malformed UTF-8 characters. PHP 5.3 |
| JSON_ERROR_RECURSION | Integer | Invalid recursive reference values. PHP 5.5 |
| JSON_ERROR_INF_OR_NAN | Integer | Invalid NAN or INF values. PHP 5.5 |
| JSON_ERROR_UNSUPPORTED_TYPE | Integer | Invalid type. PHP 5.5 |
| JSON_ERROR_INVALID_PROPERTY_NAME | Integer | Invalid property name. PHP 7.0 |
| JSON_ERROR_UTF16 | Integer | Malformed UTF-16 characters. PHP 7.0 |
| JSON_BIGINT_AS_STRING | Integer | |
| JSON_OBJECT_AS_ARRAY | Integer | |
| JSON_HEX_TAG | Integer | |
| JSON_HEX_AMP | Integer | |
| JSON_HEX_APOS | Integer | |
| JSON_HEX_QUOT | Integer | |
| JSON_FORCE_OBJECT | Integer | |
| JSON_NUMERIC_CHECK | Integer | |
| JSON_PRETTY_PRINT | Integer | |
| JSON_UNESCAPED_SLASHES | Integer | |
| JSON_PARTIAL_OUTPUT_ON_ERROR | Integer | |
| JSON_PRESERVE_ZERO_FRACTION | Integer | |
| JSON_UNESCAPED_LINE_TERMINATORS | Integer | |
| JSON_INVALID_UTF8_IGNORE | Integer | |
| JSON_INVALID_UTF8_SUBSTITUTE | Integer | |
| JSON_THROWN_ON_ERROR | Integer |