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Code optimization can reduce the execution time of the script. If you want to make your web application faster, write code in a smart way. This example will show how can you replace multiple lines of code with a single line code.
Using the looping statements, you can get an array of a specific key from the multidimensional array. But the same work can be done in a single line of code by array_column() function in PHP.
Multidimensional Array:
$users = array(
array(
'id'=>123,
'name'=>'John Doe'
),
array(
'id'=>456,
'name'=>'Merry Saw'
),
array(
'id'=>789,
'name'=>'Smith Moe'
),
array(
'id'=>147,
'name'=>'Chris Tang'
)
);
Now you want to retrieve all the IDs from $users array and create an array of id value. The following single line of code will do it easily.
$ids = array_column($users, 'id');
The above code will return an array that contains the values of the specific key.
Array
(
[0] => 123
[1] => 456
[2] => 789
[3] => 147
)
