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>Standard PHP Library (SPL) Functions</TITLE
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>CLV. Standard PHP Library (SPL) Functions</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN213926"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="spl.intro"
>简介</A
></H1
><P
> SPL is a collection of interfaces and classes that are meant to solve
standard problems.
</P
><DIV
CLASS="tip"
><BLOCKQUOTE
CLASS="tip"
><P
><B
>提示: </B
>
A more detailed documentation of SPL can be found
<A
HREF="http://www.php.net/~helly/php/ext/spl/"
TARGET="_top"
>here</A
>.
</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="spl.installation"
>安装</A
></H1
><P
> This extension is available and compiled by default in PHP 5.
</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="spl.constants"
>预定义常量</A
></H1
><P
>以下常量由本扩展模块定义，因此只有在本扩展模块被编译到
PHP 中，或者在运行时被动态加载后才有效。</P
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><TD
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><B
>警告</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
> SPL uses class constants since PHP 5.1. Prior releases use global constants
in the form <TT
CLASS="constant"
><B
>RIT_LEAVES_ONLY</B
></TT
>.
</P
></TD
></TR
></TABLE
></DIV
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>RecursiveIteratorIterator::LEAVES_ONLY</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>
</P
></DD
><DT
><TT
CLASS="constant"
><B
>RecursiveIteratorIterator::SELF_FIRST</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>
</P
></DD
><DT
><TT
CLASS="constant"
><B
>RecursiveIteratorIterator::CHILD_FIRST</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>
</P
></DD
><DT
><TT
CLASS="constant"
><B
>CachingIterator::CALL_TOSTRING</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>
</P
></DD
><DT
><TT
CLASS="constant"
><B
>CachingIterator::CATCH_GET_CHILD</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>
</P
></DD
></DL
></DIV
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><DIV
CLASS="TOC"
><DL
><DT
><B
>目录</B
></DT
><DT
><A
HREF="function.arrayiterator-current.html"
>ArrayIterator::current</A
> -- Return current array entry</DT
><DT
><A
HREF="function.arrayiterator-key.html"
>ArrayIterator::key</A
> -- Return current array key</DT
><DT
><A
HREF="function.arrayiterator-next.html"
>ArrayIterator::next</A
> -- Move to next entry</DT
><DT
><A
HREF="function.arrayiterator-rewind.html"
>ArrayIterator::rewind</A
> -- Rewind array back to the start</DT
><DT
><A
HREF="function.arrayiterator-seek.html"
>ArrayIterator::seek</A
> -- Seek to position</DT
><DT
><A
HREF="function.arrayiterator-valid.html"
>ArrayIterator::valid</A
> -- Check whether array contains more entries</DT
><DT
><A
HREF="function.arrayobject-append.html"
>ArrayObject::append</A
> -- Appends the value</DT
><DT
><A
HREF="function.arrayobject-construct.html"
>ArrayObject::__construct</A
> -- Construct a new array object</DT
><DT
><A
HREF="function.arrayobject-count.html"
>ArrayObject::count</A
> -- Return the number of elements in the Iterator</DT
><DT
><A
HREF="function.arrayobject-getiterator.html"
>ArrayObject::getIterator</A
> -- Create a new iterator from an ArrayObject instance</DT
><DT
><A
HREF="function.arrayobject-offsetexists.html"
>ArrayObject::offsetExists</A
> -- Returns whether the requested $index exists</DT
><DT
><A
HREF="function.arrayobject-offsetget.html"
>ArrayObject::offsetGet</A
> -- Returns the value at the specified $index</DT
><DT
><A
HREF="function.arrayobject-offsetset.html"
>ArrayObject::offsetSet</A
> -- Sets the value at the specified $index to $newval</DT
><DT
><A
HREF="function.arrayobject-offsetunset.html"
>ArrayObject::offsetUnset</A
> -- Unsets the value at the specified $index</DT
><DT
><A
HREF="function.cachingiterator-hasnext.html"
>CachingIterator::hasNext</A
> -- Check whether the inner iterator has a valid next element</DT
><DT
><A
HREF="function.cachingiterator-next.html"
>CachingIterator::next</A
> -- Move the iterator forward</DT
><DT
><A
HREF="function.cachingiterator-rewind.html"
>CachingIterator::rewind</A
> -- Rewind the iterator</DT
><DT
><A
HREF="function.cachingiterator-tostring.html"
>CachingIterator::__toString</A
> -- Return the string representation of the current element</DT
><DT
><A
HREF="function.cachingiterator-valid.html"
>CachingIterator::valid</A
> -- Check whether the current element is valid</DT
><DT
><A
HREF="function.cachingrecursiveiterator-getchildren.html"
>CachingRecursiveIterator::getChildren</A
> -- Return the inner iterator's children as a CachingRecursiveIterator</DT
><DT
><A
HREF="function.cachingrecursiveiterator-haschildren.html"
>CachingRecursiveIterator::hasChildren</A
> -- Check whether the current element of the inner iterator has children</DT
><DT
><A
HREF="function.directoryiterator-construct.html"
>DirectoryIterator::__construct</A
> -- Constructs a new dir iterator from a path</DT
><DT
><A
HREF="function.directoryiterator-current.html"
>DirectoryIterator::current</A
> -- Return this (needed for Iterator interface)</DT
><DT
><A
HREF="function.directoryiterator-getatime.html"
>DirectoryIterator::getATime</A
> -- Get last access time of file</DT
><DT
><A
HREF="function.directoryiterator-getctime.html"
>DirectoryIterator::getCTime</A
> -- Get inode modification time of file</DT
><DT
><A
HREF="function.directoryiterator-getchildren.html"
>DirectoryIterator::getChildren</A
> -- Returns an iterator for the current entry if it is a directory</DT
><DT
><A
HREF="function.directoryiterator-getfilename.html"
>DirectoryIterator::getFilename</A
> -- Return filename of current dir entry</DT
><DT
><A
HREF="function.directoryiterator-getgroup.html"
>DirectoryIterator::getGroup</A
> -- Get file group</DT
><DT
><A
HREF="function.directoryiterator-getinode.html"
>DirectoryIterator::getInode</A
> -- Get file inode</DT
><DT
><A
HREF="function.directoryiterator-getmtime.html"
>DirectoryIterator::getMTime</A
> -- Get last modification time of file</DT
><DT
><A
HREF="function.directoryiterator-getowner.html"
>DirectoryIterator::getOwner</A
> -- Get file owner</DT
><DT
><A
HREF="function.directoryiterator-getpath.html"
>DirectoryIterator::getPath</A
> -- Return directory path</DT
><DT
><A
HREF="function.directoryiterator-getpathname.html"
>DirectoryIterator::getPathname</A
> -- Return path and filename of current dir entry</DT
><DT
><A
HREF="function.directoryiterator-getperms.html"
>DirectoryIterator::getPerms</A
> -- Get file permissions</DT
><DT
><A
HREF="function.directoryiterator-getsize.html"
>DirectoryIterator::getSize</A
> -- Get file size</DT
><DT
><A
HREF="function.directoryiterator-gettype.html"
>DirectoryIterator::getType</A
> -- Get file type</DT
><DT
><A
HREF="function.directoryiterator-isdir.html"
>DirectoryIterator::isDir</A
> -- Returns true if file is directory</DT
><DT
><A
HREF="function.directoryiterator-isdot.html"
>DirectoryIterator::isDot</A
> -- Returns true if current entry is '.' or '..'</DT
><DT
><A
HREF="function.directoryiterator-isexecutable.html"
>DirectoryIterator::isExecutable</A
> -- Returns true if file is executable</DT
><DT
><A
HREF="function.directoryiterator-isfile.html"
>DirectoryIterator::isFile</A
> -- Returns true if file is a regular file</DT
><DT
><A
HREF="function.directoryiterator-islink.html"
>DirectoryIterator::isLink</A
> -- Returns true if file is symbolic link</DT
><DT
><A
HREF="function.directoryiterator-isreadable.html"
>DirectoryIterator::isReadable</A
> -- Returns true if file can be read</DT
><DT
><A
HREF="function.directoryiterator-iswritable.html"
>DirectoryIterator::isWritable</A
> -- Returns true if file can be written</DT
><DT
><A
HREF="function.directoryiterator-key.html"
>DirectoryIterator::key</A
> -- Return current dir entry</DT
><DT
><A
HREF="function.directoryiterator-next.html"
>DirectoryIterator::next</A
> -- Move to next entry</DT
><DT
><A
HREF="function.directoryiterator-rewind.html"
>DirectoryIterator::rewind</A
> -- Rewind dir back to the start</DT
><DT
><A
HREF="function.directoryiterator-valid.html"
>DirectoryIterator::valid</A
> -- Check whether dir contains more entries</DT
><DT
><A
HREF="function.filteriterator-current.html"
>FilterIterator::current</A
> -- Get the current element value</DT
><DT
><A
HREF="function.filteriterator-getinneriterator.html"
>FilterIterator::getInnerIterator</A
> -- Get the inner iterator</DT
><DT
><A
HREF="function.filteriterator-key.html"
>FilterIterator::key</A
> -- Get the current key</DT
><DT
><A
HREF="function.filteriterator-next.html"
>FilterIterator::next</A
> -- Move the iterator forward</DT
><DT
><A
HREF="function.filteriterator-rewind.html"
>FilterIterator::rewind</A
> -- Rewind the iterator</DT
><DT
><A
HREF="function.filteriterator-valid.html"
>FilterIterator::valid</A
> -- Check whether the current element is valid</DT
><DT
><A
HREF="function.limititerator-getposition.html"
>LimitIterator::getPosition</A
> -- Return the current position</DT
><DT
><A
HREF="function.limititerator-next.html"
>LimitIterator::next</A
> -- Move the iterator forward</DT
><DT
><A
HREF="function.limititerator-rewind.html"
>LimitIterator::rewind</A
> -- Rewind the iterator to the specified starting offset</DT
><DT
><A
HREF="function.limititerator-seek.html"
>LimitIterator::seek</A
> -- Seek to the given position</DT
><DT
><A
HREF="function.limititerator-valid.html"
>LimitIterator::valid</A
> -- Check whether the current element is valid</DT
><DT
><A
HREF="function.parentiterator-getchildren.html"
>ParentIterator::getChildren</A
> -- Return the inner iterator's children contained in a ParentIterator</DT
><DT
><A
HREF="function.parentiterator-haschildren.html"
>ParentIterator::hasChildren</A
> -- Check whether the inner iterator's current element has children</DT
><DT
><A
HREF="function.parentiterator-next.html"
>ParentIterator::next</A
> -- Move the iterator forward</DT
><DT
><A
HREF="function.parentiterator-rewind.html"
>ParentIterator::rewind</A
> -- Rewind the iterator</DT
><DT
><A
HREF="function.recursivedirectoryiterator-getchildren.html"
>RecursiveDirectoryIterator::getChildren</A
> -- Returns an iterator for the current entry if it is a directory</DT
><DT
><A
HREF="function.recursivedirectoryiterator-haschildren.html"
>RecursiveDirectoryIterator::hasChildren</A
> -- Returns whether current entry is a directory and not '.' or '..'</DT
><DT
><A
HREF="function.recursivedirectoryiterator-key.html"
>RecursiveDirectoryIterator::key</A
> -- Return path and filename of current dir entry</DT
><DT
><A
HREF="function.recursivedirectoryiterator-next.html"
>RecursiveDirectoryIterator::next</A
> -- Move to next entry</DT
><DT
><A
HREF="function.recursivedirectoryiterator-rewind.html"
>RecursiveDirectoryIterator::rewind</A
> -- Rewind dir back to the start</DT
><DT
><A
HREF="function.recursiveiteratoriterator-current.html"
>RecursiveIteratorIterator::current</A
> -- Access the current element value</DT
><DT
><A
HREF="function.recursiveiteratoriterator-getdepth.html"
>RecursiveIteratorIterator::getDepth</A
> -- Get the current depth of the recursive iteration</DT
><DT
><A
HREF="function.recursiveiteratoriterator-getsubiterator.html"
>RecursiveIteratorIterator::getSubIterator</A
> -- The current active sub iterator</DT
><DT
><A
HREF="function.recursiveiteratoriterator-key.html"
>RecursiveIteratorIterator::key</A
> -- Access the current key</DT
><DT
><A
HREF="function.recursiveiteratoriterator-next.html"
>RecursiveIteratorIterator::next</A
> -- Move forward to the next element</DT
><DT
><A
HREF="function.recursiveiteratoriterator-rewind.html"
>RecursiveIteratorIterator::rewind</A
> -- Rewind the iterator to the first element of the top level inner iterator</DT
><DT
><A
HREF="function.recursiveiteratoriterator-valid.html"
>RecursiveIteratorIterator::valid</A
> -- Check whether the current position is valid</DT
><DT
><A
HREF="function.simplexmliterator-current.html"
>SimpleXMLIterator::current</A
> -- Return current SimpleXML entry</DT
><DT
><A
HREF="function.simplexmliterator-getchildren.html"
>SimpleXMLIterator::getChildren</A
> -- Returns an iterator for the current entry if it is a SimpleXML object</DT
><DT
><A
HREF="function.simplexmliterator-haschildren.html"
>SimpleXMLIterator::hasChildren</A
> -- Returns whether current entry is a SimpleXML object</DT
><DT
><A
HREF="function.simplexmliterator-key.html"
>SimpleXMLIterator::key</A
> -- Return current SimpleXML key</DT
><DT
><A
HREF="function.simplexmliterator-next.html"
>SimpleXMLIterator::next</A
> -- Move to next entry</DT
><DT
><A
HREF="function.simplexmliterator-rewind.html"
>SimpleXMLIterator::rewind</A
> -- Rewind SimpleXML back to the start</DT
><DT
><A
HREF="function.simplexmliterator-valid.html"
>SimpleXMLIterator::valid</A
> -- Check whether SimpleXML contains more entries</DT
><DT
><A
HREF="function.class-implements.html"
>class_implements</A
> --
Return the interfaces which are implemented by the given class
</DT
><DT
><A
HREF="function.class-parents.html"
>class_parents</A
> --
Return the parent classes of the given class
</DT
><DT
><A
HREF="function.iterator-count.html"
>iterator_count</A
> -- Count the elements in an iterator</DT
><DT
><A
HREF="function.iterator-to-array.html"
>iterator_to_array</A
> -- Copy the iterator into an array</DT
><DT
><A
HREF="function.spl-autoload-call.html"
>spl_autoload_call</A
> -- Try all registered __autoload() function to load the requested class</DT
><DT
><A
HREF="function.spl-autoload-extensions.html"
>spl_autoload_extensions</A
> -- Register and return default file extensions for spl_autoload</DT
><DT
><A
HREF="function.spl-autoload-functions.html"
>spl_autoload_functions</A
> -- Return all registered __autoload() functions</DT
><DT
><A
HREF="function.spl-autoload-register.html"
>spl_autoload_register</A
> -- Register given function as __autoload() implementation</DT
><DT
><A
HREF="function.spl-autoload-unregister.html"
>spl_autoload_unregister</A
> -- Unregister given function as __autoload() implementation</DT
><DT
><A
HREF="function.spl-autoload.html"
>spl_autoload</A
> -- Default implementation for __autoload()</DT
><DT
><A
HREF="function.spl-classes.html"
>spl_classes</A
> -- Return available SPL classes</DT
><DT
><A
HREF="function.spl-object-hash.html"
>spl_object_hash</A
> --
Return hash id for given object
</DT
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