本文提供兩種方法,一種將小數變成字串,然後用”.“來截取,去.後的子字串長度。還有一種是講小數*10的N次方,比如10的8次方再對8次方取餘數,再不斷對10求餘,直到對10求餘的結果不為0。相比來說,第一種方法要好不少,理由是這樣的,比如1.000004在很邊界的時候或者0.99999這樣子PHP處理會有問題,會有誤差,導致得到的位元不一樣。而且精度難以把握,所以處理這種跟邊界有關的問題最後能用字串還是字串來做。第一種private function _getFloatLength($num)
str_replace(PHP 4, PHP 5)str_replace — Replace all occurrences of the search string with the replacement stringDescriptionmixed str_replace ( mixed $search , mixed $replace , mixed $subject [, int &$count ] )This function returns a string or an
主要關注紅色標記語句即可。The include (or require) statement takes all the text/code/markup that exists in the specified file and copies it into the file that uses the include statement.Including files is very useful when you want to include the same PHP, HTML,
foreach(PHP 4, PHP 5)The foreach construct provides an easy way to iterate over arrays. foreach works only on arrays and objects, and will issue an error when you try to use it on a variable with a different data type or an uninitialized variable.
好吧,其實我這人不看重訪問量的,但是今天一天的訪問量比我去年發的一篇還要多.我還是有點小小的驚訝的.作為一個做技術的屌絲.不,我不認為自己是屌絲,我覺得編程是一件高大山的職業.雖然很累,但是確實能讓你每天的生活很充實.No matter whether you believe it or not,anyhow I believe
在前面的章節中我們講解過如何在 Laravel架構中建立後台檔案夾.php Laravel 架構之建立後台檔案夾現在我們再添加一塊內容.是關於自動載入的部分.在我們app目錄中還有個start目錄.它裡面這樣寫道:In addition to using Composer, you may use the Laravel class loader toload your controllers and models. This is useful for keeping all ofyour