PHP Miscellaneous Introduction
Installation
The misc. functions are part of the PHP core. No installation is required to use these functions.
Runtime Configuration
The behavior of the misc. functions is affected by settings in the php.ini file.
Misc. configuration options:
| Name | Description | Default | Changeable |
|---|---|---|---|
| ignore_user_abort | FALSE indicates that scripts will be terminated as soon as they try to output something after a client has aborted their connection | "0" | PHP_INI_ALL |
| highlight.string | Color for highlighting a string in PHP syntax | "#DD0000" | PHP_INI_ALL |
| highlight.comment | Color for highlighting PHP comments | "#FF8000" | PHP_INI_ALL |
| highlight.keyword | Color for syntax highlighting PHP keywords (e.g. parenthesis and semicolon) | "#007700" | PHP_INI_ALL |
| highlight.bg | Removed in PHP 5.4.0. Color for background | "#FFFFFF" | PHP_INI_ALL |
| highlight.default | Default color for PHP syntax | "#0000BB" | PHP_INI_ALL |
| highlight.html | Color for HTML code | "#000000" | PHP_INI_ALL |
| browscap | Name and location of browser-capabilities file (e.g. browscap.ini) | NULL | PHP_INI_SYSTEM |
PHP Miscellaneous Functions
| Function | Description |
|---|---|
| connection_aborted() | Checks whether the client has disconnected |
| connection_status() | Returns the current connection status |
| connection_timeout() | Deprecated in PHP 4.0.5. Checks whether the script has timed out |
| constant() | Returns the value of a constant |
| define() | Defines a constant |
| defined() | Checks whether a constant exists |
| die() | Prints a message and exits the current script |
| eval() | Evaluates a string as PHP code |
| exit() | Prints a message and exits the current script |
| get_browser() | Returns the capabilities of the user's browser |
| __halt_compiler() | Halts the compiler execution |
| highlight_file() | Outputs a file with the PHP syntax highlighted |
| highlight_string() | Outputs a string with the PHP syntax highlighted |
| ignore_user_abort() | Sets whether a remote client can abort the running of a script |
| pack() | Packs data into a binary string |
| php_check_syntax() | Deprecated in PHP 5.0.5 |
| php_strip_whitespace() | Returns the source code of a file with PHP comments and whitespace removed |
| show_source() | Alias of highlight_file() |
| sleep() | Delays code execution for a number of seconds |
| sys_getloadavg() | Gets system load average |
| time_nanosleep() | Delays code execution for a number of seconds and nanoseconds |
| time_sleep_until() | Delays code execution until a specified time |
| uniqid() | Generates a unique ID |
| unpack() | Unpacks data from a binary string |
| usleep() | Delays code execution for a number of microseconds |
PHP 5 Predefined Misc. Constants
PHP: indicates the earliest version of PHP that supports the constant.
| Constant | Description | PHP |
|---|---|---|
| CONNECTION_ABORTED | ||
| CONNECTION_NORMAL | ||
| CONNECTION_TIMEOUT | ||
| __COMPILER_HALT_OFFSET__ | 5 |
Credit: www.w3schools.com
PHP 5 Misc. Functions
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