PHP Miscellaneous Functions
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PHP Miscellaneous Functions Introduction
We categorize functions that do not belong to other categories on this page.
Installation
Miscellaneous functions are part of the core of PHP. These functions can be used without installation.
Runtime Configuration
The behavior of the miscellaneous functions is affected by the settings in php.ini.
Miscellaneous function configuration options:
| Name | Default | Description | Changeable |
|---|---|---|---|
| ignore_user_abort | "0" | FALSE indicates that the script will be terminated if it tries to output after the client terminates the connection. | PHP_INI_ALL |
| highlight.string | "#DD0000" | Color used for highlighting strings that conform to PHP syntax. | PHP_INI_ALL |
| highlight.comment | "#FF8000" | Color used for highlighting PHP comments. | PHP_INI_ALL |
| highlight.keyword | "#007700" | Color used for highlighting PHP keywords (such as parentheses and semicolons). | PHP_INI_ALL |
| highlight.bg | "#FFFFFF" | Background color. | PHP_INI_ALL |
| highlight.default | "#0000BB" | Default color of PHP syntax. | PHP_INI_ALL |
| highlight.html | "#000000" | HTML code color. | PHP_INI_ALL |
| browscap | NULL | The name and location of the browser performance file (e.g., browscap.ini). | PHP_INI_SYSTEM |
PHP Miscellaneous Functions
PHP：Indicate the earliest PHP version that supports this function.
| Function | Description | PHP |
|---|---|---|
| connection_aborted() | Check if the client has disconnected. | 3 |
| connection_status() | Return the current connection status. | 3 |
| connection_timeout() | Not recommended for use in PHP 4.0.5. | 3 |
| constant() | Return the value of a constant. | 4 |
| define() | Define a constant. | 3 |
| defined() | Check if a constant exists. | 3 |
| die() | Outputs a message and exits the current script. | 3 |
| eval() | Calculates the string as PHP code. | 3 |
| exit() | Outputs a message and exits the current script. | 3 |
| get_browser() | Returns the performance of the user's browser. | 3 |
| highlight_file() | Highlights the syntax of a file. | 4 |
| highlight_string() | Highlights the syntax of a string. | 4 |
| ignore_user_abort() | Sets whether the script execution will be terminated if the client disconnects. | 3 |
| pack() | Packs data into a binary string. | 3 |
| php_check_syntax() | Not recommended for use in PHP 5.0.5. | 5 |
| php_strip_whitespace() | Returns the source code file with deleted PHP comments and whitespace characters. | 5 |
| show_source() | Alias of highlight_file() | 4 |
| sleep() | Delays the execution of code for several seconds. | 3 |
| time_nanosleep() | Delays the execution of code for several seconds and nanoseconds. | 5 |
| time_sleep_until() | Delays the execution of code for a specified time. | 5 |
| uniqid() | Generates a unique ID. | 3 |
| unpack() | Unpacks data from a binary string. | 3 |
| usleep() | Delays the execution of code for several microseconds. | 3 |
PHP Date / Time Constants
PHP：Indicates the earliest PHP version that supports the constant.
| Constants | Description | PHP |
|---|---|---|
| CONNECTION_ABORTED | ||
| CONNECTION_NORMAL | ||
| CONNECTION_TIMEOUT | ||
| __COMPILER_HALT_OFFSET__ | 5 |
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