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蛁: this functionality was added in php 4.0.0.
注意 この機能は、php 4.0.0で追加されました。

the size of php remains small by "outsourcing" certain functionality.
external modules can be loaded at script runtime using the function dl(). this function loads a shared object from disk and makes its functionality available to the script to which it's being bound. after the script is terminated, the external module is discarded from memory. this method has both advantages and disadvantages, as described in the following table:

returns an array of all apache response headers. this functionality is only available in php version 4.3.0 and greater.
全てのapacheレスポンスヘッダを配列として返します。この関数は、 phpバージョン4.3.0以降でのみ利用可能です。

clibpdf lets you create pdf documents with php. clibpdf functionality and api are similar to pdflib. this documentation should be read alongside the clibpdf manual since it explains the library in much greater detail.
clibpdfにより、pdf ドキュメントをphpにより作成可能となります。 clibpdfの機能とapiは、 pdflib に似て います。この文書とともによりライブラリの詳細を説明しているclibpdf のマニュアルも読んで下さい。

蛁: the following example will not work in versions of php 4 after 4.0.2. it depends on internal functionality of php which changed after that version.
この種の確認は、アップロードされたファイルに関して何でもできる場 合には、その内容をユーザ、または同じシステム上の他のユーザにさえ 暴かれる可能性があるため、特に重要です。

"extending php" is easier said than done. php has evolved to a full-fledged tool consisting of a few megabytes of source code, and to hack a system like this quite a few things have to be learned and considered. when structuring this chapter, we finally decided on the "learn by doing" approach. this is not the most scientific and professional approach, but the method that's the most fun and gives the best end results. in the following sections, you'll learn quickly how to get the most basic extensions to work almost instantly. after that, you'll learn about zend's advanced api functionality. the alternative would have been to try to impart the functionality, design, tips, tricks, etc. as a whole, all at once, thus giving a complete look at the big picture before doing anything practical. although this is the "better" method, as no dirty hacks have to be made, it can be very frustrating as well as energy- and time-consuming, which is why we've decided on the direct approach.
"extending php" is easier said than done. php has evolved to a full-fledged tool consisting of a few megabytes of source code, and to hack a system like this quite a few things have to be learned and considered. when structuring this chapter, we finally decided on the "learn by doing" approach. this is not the most scientific and professional approach, but the method that's the most fun and gives the best end results. in the following sections, you'll learn quickly how to get the most basic extensions to work almost instantly. after that, you'll learn about zend's advanced api functionality. the alternative would have been to try to impart the functionality, design, tips, tricks, etc. as a whole, all at once, thus giving a complete look at the big picture before doing anything practical. although this is the "better" method, as no dirty hacks have to be made, it can be very frustrating as well as energy- and time-consuming, which is why we've decided on the direct approach.