How to make an empty element in array be considered non existing in PHP?

Question

$var1=1; $var2=2; $var3='';
$array= array ( $var1 , $var2, $var3 );

echo count($array);
// Result (3)

I want the count result to be (2) and if possible without looping. I wonder if there's a way since I assume there are 3 keys counted. How do I eliminate the key with an empty value? This can simplify a lot of things to me.

nice, but is it possible to tell call_user_func_array() to see things that way without sending: Number of elements in type definition string doesn't match number ...? — user5235118
– user5235118, Commented Dec 17, 2016 at 13:27
@alexis That's not coming from call_user_func_array, that's coming frim mysqli_stmt_bind_param. The first argument is a string with the types of each placeholder, and the number of arguments has to match the size of that string. — Barmar
– Barmar, Commented Dec 17, 2016 at 13:51
That's why i was trying to unset the variable corresponding to a bind type (i) and to a (?) portion of the query string that i both dynamically remove. Still the corresponding variable even set to empty is counted despite its type and string portion no longer exist, and the error persisting. @Kris Roofe proposition was the keypoint to solve the problem by unsetting automatically the variable. — user5235118
– user5235118, Commented Dec 17, 2016 at 19:30

ab29007 · Accepted Answer · 2016-12-17 13:51:17Z

2

You can use array_filter to only keep the values that are non-empty in the array, like this:

array_filter($array);

So, to count only non-empty:

count(array_filter($array));

For the problem you mentioned in the comments. see if this helps:

suppose you have following array and a uery $sql:

$arr ="$name, $pass, $email, $contact, $company";
$result = $connection->prepare("$sql");
$newarr = array_merge( (array) $types, $arr);
call_user_func_array(array($result, 'bind_param'), $newarr);

edited Dec 17, 2016 at 13:51

answered Dec 17, 2016 at 13:24

ab29007

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1 Comment

user5235118 Over a year ago

Any way to tell call_user_func_array() to see things that way while binding parameters and prevent error: Number of elements in type definition string doesn't match number of of bind variables...?

LF-DevJourney · Accepted Answer · 2016-12-17 13:51:22Z

0

use

unset():

$var1=1; $var2=2; $var3='';
$array= array ( $var1 , $var2, $var3 );
unset($array[2]);

echo count($array);

answered Dec 17, 2016 at 13:51

LF-DevJourney

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2 Comments

user5235118 Over a year ago

I'm trying to exploit your way, looks like this could help

user5235118 Over a year ago

Your case helped the most to solve my problem. Thank you, but also thanks to all who tried to help

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