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>章 44. PHP 扩展库编程 API 指南</TD
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>Streams Basics</A
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> Using streams is very much like using ANSI stdio functions. The main
difference is in how you obtain the stream handle to begin with.
In most cases, you will use <B
CLASS="function"
>php_stream_open_wrapper()</B
>
to obtain the stream handle. This function works very much like fopen,
as can be seen from the example below:
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>例 44-1. simple stream example that displays the PHP home page</B
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>php_stream * stream = php_stream_open_wrapper("http://www.php.net", "rb", REPORT_ERRORS, NULL);
if (stream) {
while(!php_stream_eof(stream)) {
char buf[1024];
if (php_stream_gets(stream, buf, sizeof(buf))) {
printf(buf);
} else {
break;
}
}
php_stream_close(stream);
}</PRE
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> The table below shows the Streams equivalents of the more common ANSI stdio functions.
Unless noted otherwise, the semantics of the functions are identical.
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><B
>表 44-1. ANSI stdio equivalent functions in the Streams API</B
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><COL><COL><COL><THEAD
><TR
><TH
>ANSI Stdio Function</TH
><TH
>PHP Streams Function</TH
><TH
>Notes</TH
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><TBODY
><TR
><TD
>fopen</TD
><TD
>php_stream_open_wrapper</TD
><TD
>Streams includes additional parameters</TD
></TR
><TR
><TD
>fclose</TD
><TD
>php_stream_close</TD
><TD
> </TD
></TR
><TR
><TD
>fgets</TD
><TD
>php_stream_gets</TD
><TD
> </TD
></TR
><TR
><TD
>fread</TD
><TD
>php_stream_read</TD
><TD
>The nmemb parameter is assumed to have a value of 1, so the prototype looks more like read(2)</TD
></TR
><TR
><TD
>fwrite</TD
><TD
>php_stream_write</TD
><TD
>The nmemb parameter is assumed to have a value of 1, so the prototype looks more like write(2)</TD
></TR
><TR
><TD
>fseek</TD
><TD
>php_stream_seek</TD
><TD
> </TD
></TR
><TR
><TD
>ftell</TD
><TD
>php_stream_tell</TD
><TD
> </TD
></TR
><TR
><TD
>rewind</TD
><TD
>php_stream_rewind</TD
><TD
> </TD
></TR
><TR
><TD
>feof</TD
><TD
>php_stream_eof</TD
><TD
> </TD
></TR
><TR
><TD
>fgetc</TD
><TD
>php_stream_getc</TD
><TD
> </TD
></TR
><TR
><TD
>fputc</TD
><TD
>php_stream_putc</TD
><TD
> </TD
></TR
><TR
><TD
>fflush</TD
><TD
>php_stream_flush</TD
><TD
> </TD
></TR
><TR
><TD
>puts</TD
><TD
>php_stream_puts</TD
><TD
>Same semantics as puts, NOT fputs</TD
></TR
><TR
><TD
>fstat</TD
><TD
>php_stream_stat</TD
><TD
>Streams has a richer stat structure</TD
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