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PHP

Adam Duffield
Adam Duffield
30,494 Points

Possible to return the string value of a key in php?

Hey All,

I have an array, I'll give you a similar example...

 $search_keywords = array(
   "Manikins" => array("Manikins", "Dummies","Training"),
   "Signs" => array("Signage","Danger sign","Stuff we love to look at")
);

In this code I'm trying to extract the values where it says "Manikins & Signs as the keys if a value exists in the array.

E.g. If i type in my searchbar the word "Dummies" I want my code to give back to me the "Manikins" that the keyword "Dummies" is under.

I'm sure there will probably be someway to do this but unfortunately the treehouse courses I've done so far haven't covered this.

Cheers,

Adam

6 Answers

Hi Adam,

Maybe one of these two will be useful.

Jeff

<?php

function search_for($searchTerm) {

  $search_keywords = array(
  "Manikins" => array(
    "Manikins2",
    "Dummies",
    "Training"),
  "Signs" => array(
    "Signage",
    "Danger sign",
    "Stuff we love to look at")
  );

  foreach ($search_keywords as $key => $value) {
    foreach ($value as $theValue) {
      /*** If $theValue equals search term ***/
      if($theValue == $searchTerm) {
        $searchFound = $theValue;
        $searchFoundKey = $key;
      }
    }
  }

  if($searchFound = $searchTerm) {
  printf("<br>Key is: %s | Value is: %s",$searchFoundKey, $searchFound);
  } else {
    printf("<br>Sorry, no match found.");
  }
}

search_for("Dummies");

?>
<?php

 $search_keywords = array(
  "Manikins" => array(
    "Manikins2",
    "Dummies",
    "Training"),
  "Signs" => array(
    "Signage",
    "Danger sign",
    "Stuff we love to look at")
  );

$searchTerm = "Dummies";

foreach ($search_keywords as $key => $value) {
  foreach ($value as $theValue) {
    /*** If $theValue equals search term ***/
    if($theValue == $searchTerm) {
      $searchFound = $theValue;
      $searchFoundKey = $key;
    }
  }
}

if($searchFound = $searchTerm) {
  printf("<br>Key is: %s | Value is: %s",$searchFoundKey, $searchFound);
} else {
  printf("<br>Sorry, no match found.");
}

?>

key() returns the index element of the current array position. If you scroll down to the examples, you should be able to see how it works. I'm not sure if you'll get similar results with a two dimensional array like you have.. Worth shot!

array_keys will allow you to search all the array keys and return the name of the key if successful.

array_search is probably exactly what you're looking for? Thought I'd find it last! But again, not sure how this works with multidimensional array, maybe this will point you in the right direction!

If you think one of these fits what you're looking for but you need more help, just hit us back :-)

Logan R
Logan R
22,989 Points

Hi Adam,

You can get the key using the key function.

http://php.net/manual/en/function.key.php

Adam Duffield
Adam Duffield
30,494 Points

I've been trying all three of those with no luck so far, I think the problem is the fact that it's a multidimensional array which makes things a bit more complicated, I'll give them all another try and see if I get any luck, I'll let you know.

Cheers,

Adam

What's the background to your code? I can try and recreate - love a challenge! Someone types a query in search bar and then the term is found in the bottom level array?

Mike Costa
PLUS
Mike Costa
Courses Plus Student 26,362 Points

Heres a quick solution I came up with but it only matches exact queries in the array. What's happening here is you have the $search_keywords array setup. You loop through it with a foreach loop, so $key will equal to all your keys, and $array is the inner array of that $key. You include an if statement to check if your query string exists inside of any of those arrays. If so, it will return that key and leave the function, but if no search term was found, it will reach the end of the function and return "No search results".

Being that this was a quick solution, I didn't account for multiple keys being returned (if "Dummies" existed in other arrays), or if part of the term existed in the inner array (searching for 'to look').

Hope this helps.

<?php
function search_term($query){
    $search_keywords = array(
      "Manikins" => array(
        "Manikins2",
        "Dummies",
        "Training"),
      "Signs" => array(
        "Signage",
        "Danger sign",
        "Stuff we love to look at")
      );
    foreach($search_keywords as $key => $array){
        if(in_array($query, $array)){
            return $key;
        }
    }

    return "No search results";
}

$key = search_term('Training');
?>
Adam Duffield
Adam Duffield
30,494 Points

Cheers everyone for the help! Managed to find it out in the end thanks to Mr Jeff!

Logan R
Logan R
22,989 Points

Glad you got it all sorted out :)