PHP eval() Function
Example
Evaluate a string as PHP code:
<?php
$string = "beautiful";
$time = "winter";
$str = 'This is a $string $time morning!';
echo $str. "<br>";
eval("\$str = \"$str\";");
echo $str;
?>
$string = "beautiful";
$time = "winter";
$str = 'This is a $string $time morning!';
echo $str. "<br>";
eval("\$str = \"$str\";");
echo $str;
?>
The output of the code above will be:
This is a $string $time morning!
This is a beautiful winter morning!
This is a beautiful winter morning!
Definition and Usage
The eval() function evaluates a string as PHP code.
The string must be valid PHP code and must end with semicolon.
Note: A return statement will terminate the evaluation of the string immediately.
Tip: This function can be useful for storing PHP code in a database.
Syntax
eval(phpcode)
| Parameter | Description |
|---|---|
| phpcode | Required. Specifies the PHP code to be evaluated |
Technical Details
| Return Value: | Returns NULL unless a return statement is called in the code string. Then the value passed to return is returned. If there is a parse error in the code string, eval() returns FALSE. |
|---|---|
| PHP Version: | 4+ |
PHP Misc Reference
