I have to read a PHP array for empty values. If there are any empty values for any key, I just wanted them to be filled with some default value if empty.
1. Is there any in built function to check if empty in an array and fill it up?
(OR)
2. What is the procedure to accomplish this requirement?
array_map() can be used to apply a mapping to each array element.
$array = array(1, 0, 'foo', '', 'bar', NULL);
$default = 'DEFAULT';
var_dump(
array_map(
function($value) use ($default) {
return $value ?: $default;
},
$array
)
);
empty on variables that are guaranteed to exist. !$value will do just fine here.
There isn't a built in function which replaces empty values.
You could loop through the array, and if the value is empty, populate it.
For example
foreach($arr as &$val) {
if(empty($val)) { $val = 'Empty'; }
}
With big arrays, the peak memory usage of the array_map() function may be 2.5 times as much as the foreach loop. The fastest is the foreach construct. This construct can about 70% faster than an anonymous function, at least when there is not much to do within the loop.foreach($array as $key => value){
if(empty($value)) $array[$key] = "Some random value";
}
Try this,
$ar=array(" ","test"," ","test2");
$ar = array_replace($ar,
array_fill_keys(
array_keys($ar, " "),
"hi"
)
);
array array_filter ( array $array [, callable $callback ] )call back is a simple function to check empty() that would provide you with a list of keys with empty values in them as a result array you can then populate