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How to check if key exists in array with PHP

Directory of Wholesale Companies and Dropship Suppliers | SaleHoo

10 views
asked Sep 11 by avibootz

6 Answers

0 votes
$user = [
    'fname' => 'Jennifer',
    'age' => 45
];

if (array_key_exists('fname', $user))
    echo "true";


 
/*
run: 

true
  
*/ 

 




answered Sep 11 by avibootz
0 votes
$user = [
    'fname' => 'Jennifer',
    'age' => 45
];

if (isset($user['fname']))
    echo "true";


 
/*
run: 

true
  
*/ 

 




answered Sep 11 by avibootz
0 votes
$user = [
    'fname' => 'Jennifer',
    'age' => 45
];

if (!empty($user['fname']))
    echo "true";


 
/*
run: 

true
  
*/ 

 




answered Sep 11 by avibootz
0 votes
$user = [
    'fname' => 'Jennifer',
    'age' => 45,
    'test' => null
];

if (!empty($user['test']))
    echo "true";
else
    echo "false";


 
/*
run: 

false
  
*/ 

 




answered Sep 11 by avibootz
0 votes
$user = [
    'fname' => 'Jennifer',
    'age' => 45,
    'test' => null
];

if (isset($user['test']))
    echo "true";
else
    echo "false";


 
/*
run: 

false
  
*/ 

 




answered Sep 11 by avibootz
0 votes
$user = [
    'fname' => 'Jennifer',
    'age' => 45,
    'test' => null
];

if (array_key_exists('test', $user))
    echo "true";
else
    echo "false";


 
/*
run: 

true
  
*/  

 




answered Sep 11 by avibootz
...