原文来自于 http://stackoverflow.com/questions/1241177/c-string-format-equivalent-in-php
<?php
function format() {
$args = func_get_args();
if (count($args) == 0) { return;}
if (count($args) == 1) { return $args[0]; }
$str = array_shift($args);
$str = preg_replace_callback('/\\{(0|[1-9]\\d*)\\}/', create_function('$match', '$args = '.var_export($args, true).'; return isset($args[$match[1]]) ? $args[$match[1]] : $match[0];'), $str);
return $str;
}
echo format("hello,{0},{1},{2}", 'x0','x1','x2');
?>
output:hello,x0,x1,x2