in_array() expects parameter 2 to be array, string given in Classipress
Solution 1
the signature for in_array
looks like:
in_array($needle, $haystack, $strict = FALSE);
where:
needle
is the string,int,resource etc which you're searching for.
haystack
is the array in which you're searching
strict
(optional) If (or not) the matched item should be identical (===
)
Solution 2
You aren't using the in_array
function as it should be used.
In the second parameter you've placed a string (i.e "ID"
), it's wrong; you should place the array that you wish to search in, at that spot.
The outcome should be something like this:
$valueToSearch = "a";
$arrayToSearch = array("a", "b", "c");
echo in_array($valueToSearch, $arrayToSearch);
Please refer to the documentation
Solution 3
You used "ID" as a second parameter which is a string. Try the following:
if ( is_array($featurePostArray) && in_array($post->ID, $featurePostArray) ) {
//some action
}
Solution 4
I think I solved this problem. I've got similiar situation in my form field select multiple
which automatically creates not simple variable but array type variable(PHP weak var types). So when I declared the value at first in my code:
$lang='';
- then
$lang=$_POST['lang'];
<select id="lang" name="lang[]" multiple size="3"> <option value="en"<?php if(in_array('en',$lang)) echo ' selected';?>>English</option> <option value="fr"<?php if(in_array('fr',$lang)) echo ' selected';?>>French</option> <option value="pl"<?php if(in_array('pl',$lang)) echo ' selected';?>>Polish</option> </select><br>
- and then I tried to run script and select none of the option I got known error "in_array() expects parameter 2..."
- solution is to set(in point 1.) to empty array
$lang=array();
user3597087
Updated on January 25, 2020Comments
-
user3597087 over 4 years
I'm using
Classipress theme
for wordpress, and I'm trying to sticky my featured ads on the on in categories .I found a code that is return this error:
Warning: in_array() expects parameter 2 to be array, string given in loop-ad_listing.php on line 26
To use the sticky on top code, I had to edit two pages and insert two codes and I'll post the error part:
First:
loop-ad_listing.php
Code1:
global $postisfeatured; global $featurePostArray; if ($postisfeatured == "1") array_push($featurePostArray, $post->ID); if (in_array($post, "ID", $featurePostArray) && $postisfeatured != "1") echo '<div class="hide">';
Code2:
if ($postisfeatured != "1") { appthemes_after_endwhile(); $postisfeatured = ""; }
That line:
if (in_array($post,"ID",$featurePostArray) && $postisfeatured != "1") {
is the error.