How to add an array value to the middle of an array?

Question

Lets say I have this array:

$array = array(1,2,\'b\',\'c\',5,6,7,8,9.10);

Later in the script, I want to add the value \'d\' before \'c\'.

Answer 1

or a more self-made approach: Loop array until you see 'd' insert 'c' then 'd' in the next one. Shift all other entries right by one