Question

I have a large (~6MB) binary “string”.
Now i’d like to replace some bytes withing a range of the string.

Let’s say, replace substring (binary, bytes) from offset 1024 with length 84 with another string (binary, bytes) with the same length (no data extending).

How can i do this with php so that the performance will not be very bad.

Thanks

Answer 1

Using substr_replace() will create a new string and return its value; assigning it to the same variable should free its old value.

$s = substr_replace($s, $replacement, 1024, 84);