I have a great couple of variables named $value1, $value2 etc. I want to create an array key for each variable only if the variable is not empty. Something like this:
$array = array(
If (!empty($value1)) { "bar" => "foo", }
If (!empty($value2)) { "foo" => "bar", }
);
How do I do this and what would be good practice?
PHP arrays are dynamic, so you can add stuff to it easily:
$array = array(); // start with empty one
if (!empty($value1)) $array['bar'] = 'foo';
if (!empty($value2)) $array['foo'] = 'bar';
// you don't even have to specify a key,
// it will just increment accordingly if left out
if (!empty($value3)) $array[] = 'foobar';
this will result in (if all 3 vars are non-empty):
array(3) {
'a' => 'foo',
'b' => 'bar',
0 => 'foobar'
}
http://php.net/manual/en/language.types.array.php#language.types.array.syntax.modifying
[] empty square bracket syntax. if (!empty($value1)) $array[] = $value1; php.net/manual/en/…
You can't do it that way - if you use the array shortcut notation, you WILL create an entry in the array, whether there's a value or not. You'll have to test/set each key individually:
$arr = array();
if (!empty($value)) { $arr['bar'] = 'foo' }
You can use Variable variables:
$array = array();
$count = 4; //You can have n variables
for($i = 1; $i <= $count; $i++){
if(isset(${'value' . $i})){
$array[$i] = ${'value' . $i};
}
}
foo/barrelate above?