I'm trying to search an array and return multiple keys
<?php
$a=array("a"=>"1","b"=>"2","c"=>"2");
echo array_search("2",$a);
?>
With the code above it only returns b, how can I get I to return b and c?
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use array_keys functionAnkur Tiwari– Ankur Tiwari2015-10-11 03:45:37 +00:00Commented Oct 11, 2015 at 3:45
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3 Answers
As it says in the manual for array_search:
To return the keys for all matching values, use array_keys() with the optional search_value parameter instead.
Example:
$a=array("a"=>"1","b"=>"2","c"=>"2");
print_r(array_keys($a, "2"));
Result:
Array
(
[0] => b
[1] => c
)
1 Comment
Mike Johnston
Thanks, is there a way to display the output as just b,c or b c?
I am adding this in case someone finds it helpful. If you're doing with multi-dimensional arrays. Suppose you have this
$a = array(['user_id' => 2, 'email_id' => 1], ['user_id' => 2, 'email_id' => 2, ['user_id' => 3, 'email_id' => 1]]);
You want to find email_id of user_id 2.
You can do this
print_r(array_keys(array_column($a, 'user_id'), 2));
This will return [0,1]
Hope this helps.
Comments
use array_keys instead:
<?php
$a=array("a"=>"1","b"=>"2","c"=>"2");
echo array_keys(array($a, "2");
?>
2 Comments
Mike Johnston
Thanks for the answers taxicala but what I was looking for is something that allows me to find all instances of the word im searching for not just the first instance.
taxicala
it's what array_keys does