Parse error: syntax error, unexpected 'if' (T

How can I add a condition inside a php array?

Here is the array

$content['custom_fields'] = array(
    array( "key" => "_yoast_wpseo_focuskw", "value" => $_POST["title"] ),
    array( "key" => "_yoast_wpseo_metadesc", "value" => $_POST["titleenfa"] ),
    array( "key" => "_yoast_wpseo_metakeywords", "value" => $_POST["metakey"] ),
    if($_POST["link128"]){
        array( "key" => "_link128", "value" => "field_54b398292c295" ),
        array( "key" => "link128", "value" => $_POST["link128"] ),
    }
    if($_POST["link256"]){
        array( "key" => "_link256", "value" => "field_54b398092c294" ),
        array( "key" => "link256", "value" => $_POST["link256"] ),
    }
    if($_POST["link320"]){          
        array( "key" => "_link320", "value" => "field_54b3965495d27" ),
        array( "key" => "link320", "value" => $_POST["link320"] ),
    }
    array( "key" => "country", "value" => "USA" )
); 

But I get the PHP Parse error, why I can add a condition inside the array, what's happen??:

Parse error: syntax error, unexpected 'if' (T_IF), expecting ')'

---

You can't write a if statement in a array declaration, but what you could do is to use a ternary operator like this:

(Here you would have either way a entry)

array( "key" => "link128", "value" => (!empty($_POST["link128"])?$_POST["link128"]:"") )

OR you can use array_push() like this:

Where it push's one or more elements to the end of your array

if($_POST["link128"])
    array_push($array, $_POST["link128"]);

---

Try to modify your array code like following.....

$custom_array = array(
    array( "key" => "_yoast_wpseo_focuskw", "value" => $_POST["title"] ),
    array( "key" => "_yoast_wpseo_metadesc", "value" => $_POST["titleenfa"] ),
    array( "key" => "_yoast_wpseo_metakeywords", "value" => $_POST["metakey"]     
)); 
if($_POST["link128"]){
   $custom_array = array_merge($custom_array,array(
        array( "key" => "_link128", "value" => "field_54b398292c295" ),
        array( "key" => "link128", "value" => $_POST["link128"] ),
     ));
}
if($_POST["link256"]){
   $custom_array = array_merge($custom_array,array(
        array( "key" => "_link256", "value" => "field_54b398092c294" ),
        array( "key" => "link256", "value" => $_POST["link256"] ),
   ));
 }
if($_POST["link320"]){
   $custom_array = array_merge($custom_array,array(
       array( "key" => "_link320", "value" => "field_54b3965495d27" ),
        array( "key" => "link320", "value" => $_POST["link320"] ),
    ));

}

//And finally
$content['custom_fields'] = array_merge($custom_array,array(
   array( "key" => "country", "value" => "USA" )
));

---

感谢大家

        $content['custom_fields'] = array(
        array( "key" => "_yoast_wpseo_focuskw", "value" => $_POST["title"] ),
        array( "key" => "_yoast_wpseo_metadesc", "value" => $_POST["titleenfa"] ),
        array( "key" => "_yoast_wpseo_metakeywords", "value" => $_POST["metakey"] )
        );
        if($_POST["link128"]){
            array_push($content['custom_fields'], array( "key" => "_link128", "value" => "field_54b398292c295" ) );
            array_push($content['custom_fields'], array( "key" => "link128", "value" => $_POST["link128"] ) );
        }       
        if($_POST["link256"]){
            array_push($content['custom_fields'], array( "key" => "_link256", "value" => "field_54b398092c294" ) );
            array_push($content['custom_fields'], array( "key" => "link256", "value" => $_POST["link256"] ) );
        }   
        if($_POST["link320"]){
            array_push($content['custom_fields'], array( "key" => "_link320", "value" => "field_54b3965495d27" ) );
            array_push($content['custom_fields'], array( "key" => "link320", "value" => $_POST["link320"] ) );
        }

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