phpjs/functions/strings/strcmp.js

php.js offers community built php functions in javascript

function strcmp(str1, str2) {
  // From: http://phpjs.org/functions
  // +   original by: Waldo Malqui Silva
  // +      input by: Steve Hilder
  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +    revised by: gorthaur
  // *     example 1: strcmp( 'waldo', 'owald' );
  // *     returns 1: 1
  // *     example 2: strcmp( 'owald', 'waldo' );
  // *     returns 2: -1
  return ((str1 == str2) ? 0 : ((str1 > str2) ? 1 : -1));
}