PHP Extension for jq

This extension allows jq.

Build

% git clone --depth=1 https://github.com/kjdev/php-ext-jq.git
% cd php-ext-jq
% phpize
% ./configure
% make
% make test
% make install

Configuration

jq.ini:

extension=jq.so
; jq.display_errors=Off

Usage

$jq = Jq\Input::fromString('{"name": "jq", "version": "0.1.0"}');
print_r($jq->filter('.'));
echo 'NAME: ', $jq->filter('.name'), PHP_EOL;
echo 'VERSION: ', $jq->filter('.version'), PHP_EOL;

output:

Array
(
    [name] => jq
    [version] => 0.1.0
)
NAME: jq
VERSION: 0.1.0

Class synopsis

Jq\Input

Jq\Input {
  public static fromString(string $text): Jq\Executor
  public static fromFile(string $file): Jq\Executor
}

---

Jq\Input::fromString

public static fromString(string $text): Jq\Executor

Load a JSON string.

Parameters:

• text

  JSON text string.

Return Values:

Returns Jq\Executor instance.

---

Jq\Input::fromFile

public static fromFile(string $file): Jq\Executor

Load a JSON file.

Parameters:

• file

  JSON file name.

Return Values:

Returns Jq\Executor instance.

---

Jq\Executor

Jq\Executor {
  public filter(string $filter, int $flags): mixed
  public variable(string $name, string $value): self
  public variables(): array
}

---

Jq\Executor::filter

public filter(string $filter, int $flags = 0): mixed

Get filtering result of the load string.

Parameters:

• filter

  jq filter string.

• flags

  • Jq\RAW is raw output
  • Jq\SORT is object with the keys in sorted order

Return Values:

Returns the result value, or FALSE on error.

Jq\Executor::variable

public variable(string $name, string $value): self

Set variable value.

Parameters:

• name

  variable name.

• value

  variable value.

  • treat strings starting with @ as JSON strings

Return Values:

Returns the self instance.

Jq\Executor::variables

public variables(): array

Get variables value.

Return Values:

Returns the variables.

---

Jq\Run

Jq\Run {
  public static fromString(string $text, string $filter, int $flags = 0, array $variables = []): mixed
  public static fromFile(string $file, string $filter, int $flags = 0, array $variables = []): mixed
}

---

Jq\Run::fromString

public static fromString(string $text, string $filter, int $flags = 0, array $variables = []): mixed

Get filtering result of the JSON string.

Parameters:

• text

  JSON text string.

• filter

  jq filter string.

• flags

  • Jq\RAW is raw output
  • Jq\SORT is object with the keys in sorted order

• variables

  jq variables array.

  • key is variable name
  • value is string of variable value
    • treat strings starting with @ as JSON strings

Return Values:

Returns the result value, or FALSE on error.

---

Jq\Run::fromFile

public static fromFile(string $file, string $filter, int $flags = 0, array $variables = []): mixed

Get filtering result of the JSON file.

Parameters:

• file

  JSON file name.

• filter

  jq filter string.

• flags

  • Jq\RAW is raw output
  • Jq\SORT is object with the keys in sorted order

• variables

  jq variables array.

  • key is variable name
  • value is string of variable value
    • treat strings starting with @ as JSON strings

Return Values:

Returns the result value, or FALSE on error.

Examples

• Setting a Jq\RAW

$jq = Jq\Input::fromString('{"name": "jq", "version": "0.1.0"}');
print_r($jq->filter('.', Jq\RAW));
echo PHP_EOL;
echo 'NAME: ', $jq->filter('.name', Jq\RAW), PHP_EOL;
echo 'VERSION: ', $jq->filter('.version', Jq\RAW), PHP_EOL;

The above example will output:

{"name":"jq","version":"0.1.0"}
NAME: jq
VERSION: 0.1.0

• Execute static function

$text = '{"name": "jq", "version": "0.1.0"}';
print_r(Jq\Run::fromString($text, '.'));
echo 'NAME: ', Jq\Run::fromString($text, '.name'), PHP_EOL;
echo 'VERSION: ', Jq\Run::fromString($text, '.version', Jq\RAW), PHP_EOL;

The above example will output:

Array
(
    [name] => jq
    [version] => 0.1.0
)
NAME: jq
VERSION: 0.1.0

• Execute static function with a variables

$text = <<<EOT
[
  {"key": "string", "var": "STRING"},
  {"key": 123, "var": "NUMBER:123"}
]
EOT;
$jq = Jq\Input::fromString($text);
print_r(
  $jq->filter('.')
  // (OR) Jq\Run::fromString($text, '.')
);
print_r(
  $jq->variable('key', 'string')->filter('.[] | select(.key == $key)')
  // (OR) Jq\Run::fromString($text, '.[] | select(.key == $key)', 0, ['key' => 'string'])
);
print_r(
  $jq->variable('key', '@123')->filter('.[] | select(.key == $key)')
  // (OR) Jq\Run::fromString($text, '.[] | select(.key == $key)', 0, ['key' => '@123'])
);
// ['key' => '123'], it is evaluated as a character string, so it does not match

The above example will output:

Array
(
    [0] => Array
        (
            [key] => string
            [var] => STRING
        )

    [1] => Array
        (
            [key] => 123
            [var] => NUMBER:123
        )

)
Array
(
    [key] => string
    [var] => STRING
)
Array
(
    [key] => 123
    [var] => NUMBER:123
)