PHP Misc. Functions
PHP Miscellaneous Introduction
The misc. functions were only placed here because none of the other categories seemed to fit.
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.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 from 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() | Alias of exit() |
| 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 |
| hrtime() | Returns the system's high resolution time |
| ignore_user_abort() | Sets whether a remote client can abort the running of a script |
| pack() | Packs data into a binary string |
| 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() | Returns the system load average |
| time_nanosleep() | Delays code execution for a number of seconds and nanoseconds |
| time_sleep_until() | Makes a script sleep until the specified time |
| uniqid() | Generates a unique ID |
| unpack() | Unpacks data from a binary string |
| usleep() | Delays code execution for a number of microseconds |
PHP Predefined Misc. Constants
| Constant | Description |
|---|---|
| CONNECTION_ABORTED | Connection is aborted by user or network error |
| CONNECTION_NORMAL | Connection is running normally |
| CONNECTION_TIMEOUT | Connection timed out |
| __COMPILER_HALT_OFFSET__ |
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