使用php动态搜索jsonarray以获取多个值

Question

i have a json array

[  
  {  
     "id":1.25,
     "name":"rose",
     "Number":15,
     "SSN":[  
         12345,
         3455
     ]
  },

  {  
     "id":1.15,
     "name":"orchid",
     "Number":7,
     "SSN":[  
        12345,
        3455
     ]
  }
]

i want to get the id value if user searched with any ssn or name or by number.the input for search may not be single value that means it may be combination of ssn and name or it may be name,ssn and number .Any combination of name number ,ssn may be inputs .i have to get id value if the inputs matches using php .i used xpath for xml but i want to search fron json.can someone suggest me with any idea..thank you...

Answer 1

To search user ID by analyzing JSON string use the following approach with array_filter and array_intersect_assoc functions:

$json_str = '[ { "id":1.25, "name":"rose", "Number":15, "SSN":[ 12345, 3455 ] }, { "id":1.15, "name":"orchid", "Number":7, "SSN":[ 12345, 3455 ] }]';
$decoded = json_decode($json_str, true);

// base search structure
$search_structure = ['name' => "", 'Number' => 0];

// let's say, the following inputs have come from API (some of them may be empty or omitted)
$number = 7;
$ssn = "3455";

if ($number && is_numeric($number)) $search_structure['Number'] = $number;
$search_structure = array_filter($search_structure); // filtering out empty params
$count_params = count($search_structure);
$user_id = 0;

foreach ($decoded as $item) {
    if ($count_params == count(array_intersect_assoc($search_structure, $item))) {
        if (!$ssn || ($ssn && in_array($ssn, $item['SSN']))) {
            $user_id = $item['id'];
            break;
        }
    }
}

print_r(($user_id)? "User id: $user_id" : "User with specified params not found!");

The output:

User id: 1.15

Answer 2

Lets $json contains an array string

$ar = json_decode($json, true);
$id = false;
foreach ($ar as $i) 
   if ($i["name"] == "rose" and  $i["Number"] == 15)
      { $id = $i["id"]; break; }
if ($id !== false) { 
   // use $id
}

Answer 3

Preferably, convert the json data to native PHP Object and then using foreach, loop over the object and extracting the ID of the Objects that match the given SSN Number. The result of the extraction would be assigned to an array. Below is a Commented procedure of 1 possible way of going about this:

    <?php

        // WE ASSUME, JUST FOR TESTING PURPOSES THAT THE SSN NUMBER WE ARE LOOKING FOR IS 4567
        $ssnNumber  = 4567; //3455;

        // CREATE A NEW ARRAY VARIABLE TO HOLD THE IDs YOU DESIRE & INITIALIZE IT TO AN EMPTY ARRAY
        $arrIDS     = array();
        $jsonData   = '[
              {
                 "id"       :1.25,
                 "name"     :"rose",
                 "Number"   :15,
                 "SSN"      :[
                        12345,
                        3455
                 ]
              },

              {
                 "id"       :1.15,
                 "name"     :"orchid",
                 "Number"   :7,
                 "SSN"      :[
                        12345,
                        3455
                 ]
              },

              {
                 "id"       :1.75,
                 "name"     :"orchid",
                 "Number"   :79,
                 "SSN"      :[
                        4567,
                        89012
                 ]
              }
            ]';
        // CONVERT $jsonData TO NATIVE PHP OBJECT
        $objJson    = json_decode($jsonData);

        // LOOP THROUGH THE PHP OBJECT & TEST IF A GIVEN SSN EXIST.
        foreach($objJson as $key=>$data){
            // CHECK IF THE $data->SSN IS SET:
            if(isset($data->SSN) && is_array($data->SSN)){
                // CHECK IF THE SSN ARRAY CONTAINS THE GIVEN SSN NUMBER.
                if(in_array($ssnNumber, $data->SSN)){
                    $arrIDS[]   = $data->id;
                }
            }
        }
        var_dump($arrIDS);  // DISPLAY: array (size=1) 0 => float 1.75

Alternatively, one could as well encapsulate the above Routine withina Function for re-usability like so:

    <?php    
        function getIDBySSN($jsonData, $ssnNumber){
            $arrIDs     = array();
            $objJson    = json_decode($jsonData);
            // LOOP THROUGH THE PHP OBJECT & TEST IF A GIVEN SSN EXIST.
            foreach($objJson as $key=>$data){
                // CHECK IF THE $data->SSN IS SET:
                if(isset($data->SSN) && is_array($data->SSN)){
                    // CHECK IF THE SSN ARRAY CONTAINS THE GIVEN SSN NUMBER.
                    if(in_array($ssnNumber, $data->SSN)){
                        $arrIDs[]   = $data->id;
                    }
                }
            }
            return $arrIDs;
        }

        var_dump(getIDBySSN($jsonData, $ssnNumber)); // PRODUCES THE SAME RESULT

Test it HERE: