How to convert PHP array to a JSON array? -

How to convert PHP array to a JSON array? -

for example, have next code in json:

{ "tag": "img", "attr": [ { "alt": "text", "src": "url", "void": "true", "all": "true" } ] }

what php code should utilize echo/print code above? tried this:

$arr = array ( "tag" => "img", $attr = array ( "alt" => "text", "src" => "url", "void" => "true", "all" => "true" ) );

and then:

echo $arr = json_encode($arr);

but error. ideas?

your array declaration wrong. should be:

$arr = array ( "tag" => "img", "attr" => array ( "alt" => "text", "src" => "url", "void" => "true", "all" => "true" ) );

php arrays json