PHP eval() Function
 Complete PHP Misc Reference
Definition and Usage
The eval() function evaluates a string as PHP code.
The string must be valid PHP code and must end with semicolon.
This function 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.
Syntax
| Parameter |
Description |
| phpcode |
Required. Specifies the PHP code to be evaluated |
Tips and Notes
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.
Example
<?php
$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!
|
Complete PHP Misc Reference
 |
|
Get Your Diploma!
W3Schools' Online Certification Program is the perfect solution for busy
professionals who need to balance work, family, and career building.
The HTML Certificate is for developers who want to document their knowledge of HTML, XHTML, and CSS.
The ASP Certificate is for developers who want to document their knowledge of ASP, SQL, and ADO.
|
|
Printer friendly page
