PHP Files: An Introduction
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Working with files in PHP can be a fun and a frustrating task; one you never know when you'll be asked to do. In our first beginner PHP talk, we'll go over how to work with files and some of the most common built in functions to help accomplish your tasks.
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PHP Files: An Introduction
- 2. Who am I? • Graphic designer turned programmer • PHP/JS Developer 10 years experience • Have worked in Python, ActionScript, ColdFusion, others… • Big community supporter • Co-author of virtPHP Misses his beard.
- 4. So, files . . .
- 5. • fpassthru • fputcsv • fputs • fread • fscanf • fseek • fstat • ftell • ftruncate • fwrite • glob • is_dir • is_executable • is_file • is_link • is_readable • is_uploaded_file • is_writeable • lchgrp • lchown • link • linkinfo • lstat • mkdir • move_uploa • parse_ini_fil • parse_ini_str • pathinfo • pclose • popen • readfile • readlink • realpath_cac • realpath_cac • basename • chgrp • chmod • chown • clearstatcache • copy • delete • dirname • disk_free_space • disk_total_space • diskfreespace • fclose • feof • fflush • fgetc • fgetcsv • fgets • fgetss • file_exists • file_get_contents • file_put_contents • file • fileatime • filectime • filegroup • fileinode • filemtime • fileowner • fileperms • filesize • filetype • flock • fnmatch • fopen THERE’S A LOT
- 6. 3 Scenarios
- 7. 3 Scenarios 1. Upload 2. Moving 3. Reading/Writing
- 8. 1. Upload 2. Moving 3. Reading/Writing
- 9. 1. Upload $file = $_FILES[‘uploaded_file’];
- 10. 1. Upload $file[ ‘name’, ‘tmp_name’, ‘size’, ‘error’, ‘type’ ]; http://php.net/manual/en/features.file-upload.post-method.php php 5.4 short array syntax
- 11. 1. Upload http://php.net/manual/en/features.file-upload.post-method.php $file[ ‘name’, ‘tmp_name’, ‘size’, ‘error’, ‘type’ ]; File name Tmp name/path Size in bytes 0 if nothing File type
- 12. 1. Upload http://php.net/manual/en/features.file-upload.post-method.php $file[ ‘name’ = ‘file.png’, ‘tmp_name’ = ‘/tmp/ExOY.png’, ‘size’ = ‘1230’, ‘error’ = ‘UPLOAD_ERR_NO_FILE’, ‘type’ = ‘image/png’ ];
- 13. 1. Upload http://php.net/manual/en/features.file-upload.post-method.php http://php.net/manual/en/features.file-upload.errors.php List of File Errors
- 14. 2. Moving if (file_exists($file[‘tmp_name’])) { ! } never assume a file is there
- 15. 2. Moving if (is_upload_file($file[‘tmp_name’])) { ! } just for uploads
- 16. Tip Permissions is the biggest issue you run into when working with files.
- 17. 2. Moving is_file() is_link() is_readable() is_upload_file() is_writeable() some other check helpers
- 20. 2. Moving if (file_exists($file[‘tmp_name’])) { move_uploaded_file( $file[‘tmp_name’], ‘/Users/jacques/file_bucket/’ . $file[‘name’] ); }
- 21. 2. Moving if (file_exists($file[‘tmp_name’])) { move_uploaded_file( $file[‘tmp_name’], ‘/Users/jacques/file_bucket/’ . $file[‘name’] ); } always make sure a filename is provided
- 23. 2. Moving if (file_exists( ‘/Users/jacques/file_bucket/’ . $file[‘name’] )) { rename( ‘/Users/jacques/file_bucket/’ . $file[‘name’] ‘/Users/jacques/file_bucket/Cool.png’ ); }
- 24. 2. Moving if (file_exists( ‘/Users/jacques/file_bucket/’ . $file[‘name’] )) { rename( ‘/Users/jacques/file_bucket/’ . $file[‘name’] ‘/Users/Angela/Pictures/heart.png’ ); }
- 26. 2. Moving if (file_exists( ‘/Users/jacques/file_bucket/Cool.png’ )) { unlink( ‘/Users/jacques/file_bucket/Cool.png’ ); }
- 27. 3. Reading/Writing file() start with read readfile() file_get_contents()
- 28. 3. Reading/Writing file() readfile() file_get_contents() reads to array reads to output buffer reads to string
- 29. 3. Reading/Writing file() readfile() file_get_contents() for manipulation for outputting contents elsewhere for manipulation
- 30. 3. Reading/Writing file() readfile() file_get_contents() WATCH MEMORY no worries on memory WATCH MEMORY
- 31. 3. Reading/Writing fopen() let’s do some writing fwrite() fclose()
- 32. 3. Reading/Writing fopen() or more simple fwrite() fclose() file_put_contents()
- 34. 3. Reading/Writing file_put_contents( ‘/Users/jacques/file.txt’, $content ); will create file if not already there