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If you are new to PHP or just need to refresh your skills, this is the place to start. This series of tutorials will give you the basic knowledge you will need to create a simple PHP website.

PHP is a reflective programming language originally designed for producing dynamic web pages.[1] PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses.

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file_exists

(PHP 3, PHP 4, PHP 5)

file_exists -- Checks whether a file or directory exists

Description

bool file_exists ( string filename )

Returns TRUE if the file or directory specified by filename exists; FALSE otherwise.

On windows, use //computername/share/filename or \\computername\share\filename to check files on network shares.

Example 1. Testing whether a file exists

<?php
$filename = '/path/to/foo.txt';

if (file_exists($filename)) {
    echo "The file $filename exists";
} else {
    echo "The file $filename does not exist";
}
?>

Note: The results of this function are cached. See clearstatcache() for more details.

Tip: As of PHP 5.0.0 this function can also be used with some URL wrappers. Refer to Appendix N for a listing of which wrappers support stat() family of functionality.

Warning

This function returns FALSE for files inaccessible due to safe mode restrictions. However these files still can be included if they are located in safe_mode_include_dir.

Note: The check is done using the real UID/GID instead of the effective one.

See also is_readable(), is_writable(), is_file() and file().

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Another Useful functions:


zend.ini-file-support | zend-api.zend-get-scanned-file-offset | zend-api.zend-file-handle-dtor | zend-api.zend-destroy-file-handle | zend-api.virtual-file-ex | zend-api.open-file-for-scanning | streams.file-api | function.xdiff-file-patch | function.xdiff-file-patch-binary | function.xdiff-file-merge3 | function.xdiff-file-diff | function.xdiff-file-diff-binary | function.set-file-buffer | function.mysqli-set-local-infile-handler | function.mysqli-set-local-infile-default | function.ifx-blobinfile-mode | function.file-put-contents | function.file-get-contents | function.file-exists | features.file-upload.put-method | features.file-upload.multiple | features.file-upload | features.file-upload.errors | features.file-upload.common-pitfalls |


PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual, and the example archive sites and some of the other resources available in the links section.