function search_expression_insert

Adds a module-specific search option to a search expression.

Search options are added using search_expression_insert(), and retrieved using search_expression_extract(). They take the form option:value, and are added to the ordinary keywords in the search expression.

Parameters

$expression: The search expression to add to.

$option: The name of the option to add to the search expression.

$value: The value to add for the option. If present, it will replace any previous value added for the option. Cannot contain any spaces or | characters, as these are used as delimiters. If you want to add a blank value $option: to the search expression, pass in an empty string or a string that is composed of only spaces. To clear a previously-stored option without adding a replacement, pass in NULL for $value or omit.

Return value

$expression, with any previous value for this option removed, and a new: $option:$value pair added if $value was provided.

File

core/modules/search/search.module, line 959

Enables site-wide keyword searching.

Code

function search_expression_insert($expression, $option, $value = NULL) {
  // Remove any previous values stored with $option.
  $expression = trim(preg_replace('/(^| )' . $option . ':[^ ]*/i', '', $expression));

  // Set new value, if provided.
  if (isset($value)) {
    $expression .= ' ' . $option . ':' . trim($value);
  }
  return $expression;
}