class Substr in Drupal 8

Same name and namespace in other branches

9 core/modules/migrate/src/Plugin/migrate/process/Substr.php \Drupal\migrate\Plugin\migrate\process\Substr

Returns a substring of the input value.

The substr process plugin returns the portion of the input value specified by the start and length parameters. This is a wrapper around mb_substr().

Available configuration keys:

start: (optional) The returned string will start this many characters after the beginning of the string, defaults to 0.
length: (optional) The maximum number of characters in the returned string, defaults to NULL.

If start is 0 and length is an integer, the start position is the beginning of the string. If start is an integer and length is NULL, the substring starting from the start position until the end of the string will be returned. If start is 0 and length is NULL the entire string is returned.

Example:


process:
  new_text_field:
    plugin: substr
    source: some_text_field
    start: 6
    length: 10

If some_text_field was 'Marie Skłodowska Curie' then $destination['new_text_field'] would be 'Skłodowska'.

The PHP equivalent of this is:

$destination['new_text_field'] = substr($source['some_text_field'], 6, 10);

The substr plugin requires that the source value is not empty. If empty values are expected, combine skip_on_empty process plugin to the pipeline:


process:
  new_text_field:
   -
     plugin: skip_on_empty
     method: process
     source: some_text_field
   -
     plugin: substr
     source: some_text_field
     start: 6
     length: 10

Plugin annotation


@MigrateProcessPlugin(
  id = "substr"
)

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\migrate\ProcessPluginBase implements MigrateProcessInterface
    class \Drupal\migrate\Plugin\migrate\process\Substr

Expanded class hierarchy of Substr

File

core/modules/migrate/src/Plugin/migrate/process/Substr.php, line 67

Namespace

Drupal\migrate\Plugin\migrate\process

View source

class Substr extends ProcessPluginBase {

  /**
   * {@inheritdoc}
   */
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    $start = isset($this->configuration['start']) ? $this->configuration['start'] : 0;
    if (!is_int($start)) {
      throw new MigrateException('The start position configuration value should be an integer. Omit this key to capture from the beginning of the string.');
    }
    $length = isset($this->configuration['length']) ? $this->configuration['length'] : NULL;
    if ($length !== NULL && !is_int($length)) {
      throw new MigrateException('The character length configuration value should be an integer. Omit this key to capture from the start position to the end of the string.');
    }
    if (!is_string($value)) {
      throw new MigrateException('The input value must be a string.');
    }

    // Use optional start or length to return a portion of $value.
    return mb_substr($value, $start, $length);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object.	92
ProcessPluginBase::multiple	public	function	Indicates whether the returned value requires multiple handling. Overrides MigrateProcessInterface::multiple	3
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.
Substr::transform	public	function	Performs the associated process. Overrides ProcessPluginBase::transform

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