06-06-2015
Real-time scenarios where VARIABLE SUBSTITUTION/EXPANSION is useful
Hi,
at academic level I am familiar with how variable substitution/expansion feature works. From your live experience, can you please tell what are real-time scenarios where ${variable:=} ${variable%pattern} ${variable:=word} sort of features can be used? How can we connect that dot that this feature is useful in this scenario? One thing, I can think of is FULL-PATH-NAME related stripping etc. please share your thoughts.
thank you
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LEARN ABOUT PHP
apache_setenv
APACHE_SETENV(3) 1 APACHE_SETENV(3)
apache_setenv - Set an Apache subprocess_env variable
SYNOPSIS
bool apache_setenv (string $variable, string $value, [bool $walk_to_top = false])
DESCRIPTION
apache_setenv(3) sets the value of the Apache environment variable specified by $variable.
Note
When setting an Apache environment variable, the corresponding $_SERVER variable is not changed.
PARAMETERS
o $variable
- The environment variable that's being set.
o $value
- The new $variable value.
o $walk_to_top
- Whether to set the top-level variable available to all Apache layers.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Setting an Apache environment variable using apache_setenv(3)
<?php
apache_setenv("EXAMPLE_VAR", "Example Value");
?>
NOTES
Note
apache_setenv(3) can be paired up with apache_getenv(3) across separate pages or for setting variables to pass to Server Side
Includes (.shtml) that have been included in PHP scripts.
SEE ALSO
apache_getenv(3).
PHP Documentation Group APACHE_SETENV(3)