php searching in multidimensional array of unknown depth -
i try select data of array constructed json_decode(). in principle multiarray of unknown dimension.
first of all, want search recursively value in array. next step want other values of upper dimension. here example:
i search for: "2345"
.... $json[3][6]['journal']['headline']="news" $json[3][6]['journal']['article']=2345 .... $json[8]['journal']['headline']="weather" $json[8]['journal']['article']=2345 .... after want value of element headline (returning "news" , "weather")
it might element 2345 can found in different dimensions!!!
someone recursiveiteratoriterator object, have hard time iterator objects, here robust system:
<?php // traverse array , find // value while storing base key class recurselocator { public static $saved = array(); public static $find; public static $trigger; public static function initialize($find = false) { self::$find = $find; } public static function recursive(array $array) { foreach($array $key => $value) { if(!isset(self::$trigger) || (isset(self::$trigger) && empty(self::$trigger))) { if(is_numeric($key)) self::$trigger = $key; } if(!is_array($value)) { if($value == self::$find) { self::$saved[self::$trigger] = $value; } } if(is_array($value)) { $value = self::recursive($value); if(!is_numeric($key)) self::$trigger = ""; } $return[$key] = $value; } return $return; } } // class traverse array searching // specific key or keys class recursesearch { public $data; public $compare; public function find($array = '',$find,$recursive = true) { $find = (is_array($find))? implode("|",$find):$find; if(is_array($array)) { foreach($array $key => $value) { if(preg_match("/$find/",$key)) $this->compare[$key] = $value; if($recursive == true) { if(!is_array($value)) { if(preg_match("/$find/",$key)) { $this->data[$key][] = $value; } $array[$key] = $value; } else { if(preg_match("/$find/",$key)) $this->data[$key][] = $this->find($value,$find); $array[$key] = $this->find($value,$find); } } else { if(preg_match("/$find/",$key)) $this->data[$key] = $value; } } $this->data = (isset($this->data))? $this->data:false; return $this; } } } // function wraps recursesearch class function get_key_value($array = array(), $find = array(),$recursive = true) { $finder = new recursesearch(); return $finder->find($array,$find,$recursive); } usage:
$json[3][6]['journal']['headline'] = "news"; $json[3][6]['journal']['article'] = 2345; $json[8]['journal']['headline'] = "weather"; $json[8]['journal']['article'] = 2345; $json[4][1]['journal']['headline'] = "news"; $json[4][1]['journal']['article'] = 22245; $json[5]['journal']['headline'] = "weather"; $json[5]['journal']['article'] = 233345; // set search criteria recurselocator::initialize(2345); // traverse array looking value $arr = recurselocator::recursive($json); // if found, stored here $iso = recurselocator::$saved; /* $iso looks like: array ( [3] => 2345 [8] => 2345 ) */ // loop through $iso array foreach($iso $key => $value) { // save new array search results $new[] = get_key_value($json[$key],array("headline","article"),true); } /* $new looks like: array ( [0] => recursesearch object ( [data] => array ( [headline] => array ( [0] => news ) [article] => array ( [0] => 2345 ) ) [compare] => array ( [headline] => news [article] => 2345 ) ) [1] => recursesearch object ( [data] => array ( [headline] => array ( [0] => weather ) [article] => array ( [0] => 2345 ) ) [compare] => array ( [headline] => weather [article] => 2345 ) ) ) */ ?> just side note, above class stores multiple found in [data], , stores them in [compare], [compare] overwrite if multiple same-keys found in 1 array [data] keep adding values.