andrey Sun Mar 28 04:30:22 2004 EDT
Modified files:
/php-src README.PHP4-TO-PHP5-THIN-CHANGES
Log:
- Fixed the explanation and example about "classes must be declared before used".
- Added new entry about get_class() (Thanks Lukas for reminding
(toStudlyCapOrNotToStudlyCap.txt).
http://cvs.php.net/diff.php/php-src/README.PHP4-TO-PHP5-THIN-CHANGES?r1=1.15&r2=1.16&ty=u
Index: php-src/README.PHP4-TO-PHP5-THIN-CHANGES
diff -u php-src/README.PHP4-TO-PHP5-THIN-CHANGES:1.15
php-src/README.PHP4-TO-PHP5-THIN-CHANGES:1.16
--- php-src/README.PHP4-TO-PHP5-THIN-CHANGES:1.15 Thu Feb 12 09:44:58 2004
+++ php-src/README.PHP4-TO-PHP5-THIN-CHANGES Sun Mar 28 04:30:21 2004
@@ -1,5 +1,5 @@
-1. strrpos() and strripos() now use the entire string as a needle.
- Be aware that the existing scripts may no longer work as you expect.
+1. strrpos() and strripos() now use the entire string as a needle. Be aware
+ that the existing scripts may no longer work as you expect.
EX :
<?php
@@ -53,18 +53,55 @@
variables_order setting. As in, the CLI version will now always populate
the global $argc and $argv variables.
-8. Classes must be declared before used:
+8. In some cases classes must be declared before used. It only happens only
+ if some of the new features of PHP 5 are used. Otherwise the behaviour is
+ the old.
+ Example 1 (works with no errors):
<?php
- $test = new fubar();
- $test->barfu();
+ $a = new a();
+ class a {
+ }
+ ?>
+
+ Example 2 (throws an error):
+ <?php
+ $a = new a();
+ interface b{
+ }
+ class a implements b {
+ }
+ ?>
+
+ Output (example 2) :
+ Fatal error: Class 'a' not found in /tmp/cl.php on line 2
- class fubar {
- function barfu() {
- echo 'fubar';
- }
+9. get_class() starting PHP 5 returns the name of the class as it was
+ declared which may lead to problems in older scripts that rely on
+ the previous behaviour - the class name is lowercased.
+ Example :
+ <?php
+ class FooBar {
}
+ $a = new FooBar();
+ var_dump(get_class($a));
?>
- This script is perfectly valid and works in PHP 4 but with PHP 5 there
- will be a fatal error like :
- Fatal error: Class 'fubar' not found in ....
- If there is defined function __autoload() it will be called.
+
+ Output (PHP 4):
+ string(6) "foobar"
+
+ Output (PHP 5):
+ string(6) "FooBar"
+ ----------------------------------------------------------------------
+ Example code that will break :
+ //....
+ function someMethod($p) {
+ if (get_class($p) != 'helpingclass') {
+ return FALSE;
+ }
+ //...
+ }
+ //...
+ Possible solution is to search for get_class() in all your scripts and
+ use strtolower().
+
+
\ No newline at end of file
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