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Index: U
- uasort( ) function: 5.8.1. Sorting One Array at a Time
- ucfirst( ) function: 4.4.2. Changing Case
- ucwords( ) function: 4.4.2. Changing Case
- uksort( ) function: 5.8.1. Sorting One Array at a Time
- umask( ) function: 12.4.1. Get It Right the First Time
- unary operators: 2.4.1. Number of Operands
- uncompressing and extracting PHP and Apache distributions: 1.3. Installing PHP
- underlining text in PDF files: 10.3.3. Text Attributes
- Unicode
- union of two sets: 5.10.1. Sets
- uniqid( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
- Unix
- installing PHP: 1.3. Installing PHP
- locale system in POSIX-style regular expressions: 4.9. POSIX-Style Regular Expressions
- protocol for databases: 8.3.1. Data Source Names
- shell scripting languages, comments in: 2.1.4.1. Shell-style comments
- writing portable PHP code for: 15.2. Writing Portable Code for Windows and Unix
- determining the platform: 15.2.1. Determining the Platform
- end-of-file handling: 15.2.8. End-of-File Handling
- end-of-line handling: 15.2.7. End-of-Line Handling
- environment information: 15.2.3. The Environment
- extensions: 15.2.10. Common Platform-Specific Extensions
- paths, handling: 15.2.2. Handling Paths Across Platforms
- remote files: 15.2.6. Remote Files
- sending mail: 15.2.4. Sending Mail
- server-specific functions: 15.2.5. Server-Specific Functions
- shell commands: 15.2.9. External Commands
- unlink( ) function: 3.1. Calling a Function
- unpack( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
- unpacking Apache and PHP source distributions: 1.3. Installing PHP
- unparsed XML entities: 11.3.4. Entity Handlers
- unregister_tick_function( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
- unserialize( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
- unset( ) function: 2.3.4. Garbage Collection
- uploaded files
- uploading files: 7.4.8. File Uploads
- URL rewriting, storing state information: 7.6. Maintaining State
- urldecode( ) function: 4.5.2.2. Query-string encoding
- urlencode( ) function: 4.5.2.2. Query-string encoding
- URLs
- decomposing (parse_url( ) function): 4.7.4.4. Decomposing URLs
- encoding/decoding: A.3d. Alphabetical Listing of PHP Functions (r-z)
- encoding/decoding strings as: 4.5.2. URLs
- extracting from HTML page: 4.10.13.1. Matching
- functions for: A.1. PHP Functions by Category
- GET and POST requests: 7.4.1. Methods
- https\://: 7.7. SSL
- opening remotely with PHP functions, security risks of: 12.2. Filenames
- parse_url( ) function: A.2c. Alphabetical Listing of PHP Functions (j-q)
- session IDS, passing via: 7.6.2.2. Alternatives to cookies
- US-ASCII (see ASCII)
- User-Agent headers: 7.1. HTTP Basics
- user-defined functions: 3.1. Calling a Function
- user-defined order, sorting arrays in: 5.8.1. Sorting One Array at a Time
- user_error( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
- usernames
- usleep( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
- usort( ) function: 5.8.1. Sorting One Array at a Time
- UTF-8 character encoding: 11.3.6.1. Character encoding
Symbols & Numbers | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
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