How can you define arrays of strings in PHP?

"We often need to deal with collections of strings. In PHP we can define arrays of strings. Indeed, we’ve seen arrays of strings before. When processing command line arguments, PHP defines an array of strings, $argv. Each string can be accessed using an index, $argv[0] for example is always the name of the script. We can create our own arrays of strings using the same syntax as with other arrays.\n\n$names = array(\n\n\"Margaret Hamilton\",\n\n\"Ada Lovelace\",\n\n\"Grace Hopper\",\n\n\"Marie Curie\",\n\n\"Hedy Lamarr\"\n\n);"