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@NogDogFeb 19.2008 — #Yes, there is a way: the [url=http://us2.php.net/manual/en/function.constant.php]constant[/url] () function:
@NogDogFeb 19.2008 — #
I do not understand what you mean. It does exactly what is requested: it allows the dynamic selection via a variable as to which constant value is used. What does self-awareness have to do with it? What am I failing to understand? Why did the builders of PHP decide to create the constant() function if it "defeats the point of a constant...and is not self aware"? It does not change the value of the constant, and it will only return a value if the specified constant exists, else null. What's wrong with that?
Problem handling constants
I need your help to solve a problem I’ve bumped into.
The best way to explain it is with a simple example (how bad sounds this!!), better than to put much more complex code:
[code=php]<?php
define(“myConstant1”, 3);
define(“myConstant2”, 5);
define(“myConstant3”, 7);
define(“myConstant4”, 9);
echo “<p>My Constants: “.myConstant1.”, “.myConstant2.”, “.myConstant3.”, “.myConstant4.”</p>”;
$constants_list = array(‘myConstant1’, ‘myConstant2’, ‘myConstant3’, ‘myConstant4’);
echo “<p>My Constants: “;
for ($i=0; $i < 4; $i++) {
echo $constants_list[$i].” “;
}
echo “</p>”;
?>
The “for” loop outputs the name of the constants, and what I want is to output their value. How could I do this? I tried with eval() but I got an error syntax.
Any help please?
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@NogDogFeb 19.2008 — #Yes, there is a way: the [code=php]
define("TEST", "This is a test.");
$var = "TEST";
echo "The value of constant '$var' is '" . constant($var) . "'.";
[/code]0
@NogDogFeb 19.2008 — #Which defeats the point of a constant as pointed out above and is not self aware.[/QUOTE]
I do not understand what you mean. It does exactly what is requested: it allows the dynamic selection via a variable as to which constant value is used. What does self-awareness have to do with it? What am I failing to understand? Why did the builders of PHP decide to create the constant() function if it "defeats the point of a constant...and is not self aware"? It does not change the value of the constant, and it will only return a value if the specified constant exists, else null. What's wrong with that?