substr_replace

• We can replace a substring of characters within a string using a similar method to that demonstrated in Ruby’s syntax for substr. This time however we’re assigning a new value to positions we specify.

  Assign the first five characters of a string:

  PHP

  print substr_replace("hello world", "hey", 0, 5);
  // => hey world

  Ruby

  puts "hello world"[0, 5] = "hey"
  # => hey world

  Assign all characters after a specified position. In Ruby we can use Ranges to specify a range of character positions:

  PHP

  print substr_replace("hello world", "p", 3);
  // => help

  Ruby

  puts "hello world"[3..-1] = "p"
  # => help

  Assign the last five characters in the string:

  PHP

  print substr_replace("hello world", "p", 3);
  // => help

  Ruby

  puts "hello world"[3..-1] = "p"
  # => help

  see also

  • str_replace
  • substr

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