str_replace

  • All replacements in Ruby are done using String#gsub. This method does both regular expression and string based replacements.

    PHP

    $result = str_replace('Hello', 'Hi', 'Hello world');
var_export($result);
// => 'Hi world'

    Ruby

    p "Hello world".gsub("Hello", "Hi")
# => "Hi world"

    Ruby also has the String#gsub! method which modifies the string value directly.

    Ruby

    my_string = "Hello world"
 
# the original string remains the same (we use the return value)
my_string.gsub("Hello", "Hi")
p my_string
# => "Hello world"
 
# the original string is modified
my_string.gsub!("Hello", "Hi")
p my_string
# => "Hi world"

    see also

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