Commit: 57c50f8fed33bc74e41191f6b351f16cc215d3af Author: Johannes Schlüter <johan...@php.net> Wed, 17 Jul 2013 23:25:44 +0200 Parents: f7e204d7ed57754eceb01004b68dc733d3259c4c Branches: master
Link: http://git.php.net/?p=php-src.git;a=commitdiff;h=57c50f8fed33bc74e41191f6b351f16cc215d3af Log: Drop PHP 4 related README Changed paths: D README.PHP4-TO-PHP5-THIN-CHANGES Diff: diff --git a/README.PHP4-TO-PHP5-THIN-CHANGES b/README.PHP4-TO-PHP5-THIN-CHANGES deleted file mode 100644 index 0a2c6d6..0000000 --- a/README.PHP4-TO-PHP5-THIN-CHANGES +++ /dev/null @@ -1,155 +0,0 @@ -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 - var_dump(strrpos("ABCDEF","DEF")); - var_dump(strrpos("ABCDEF","DAF")); - ?> - - Will give you different results. The former returns 3 while the latter - returns false rather than the position of the last occurrence of 'D'. - The same applies to strripos(). - -2. Illegal use of string offsets causes E_ERROR instead of E_WARNING. - - EX : - <?php - $a = "foo"; - unset($a[0][1][2]); - ?> - - Fatal error: Cannot use string offset as an array in ... on line 1 - -3. array_merge() was changed to accept only arrays. If a non-array variable is - passed, a E_WARNING will be thrown for every such parameter. Be careful - because your code may start emitting E_WARNING out of the blue. - -4. Be careful when porting from ext/mysql to ext/mysqli. The following - functions return NULL when no more data is available in the result set - (ext/mysql's functions return FALSE). - - - mysqli_fetch_row() - - mysqli_fetch_array() - - mysqli_fetch_assoc() - -5. PATH_TRANSLATED server variable is no longer set implicitly under - Apache2 SAPI in contrast to the situation in PHP 4, where it is set to the - same value as the SCRIPT_FILENAME server variable when it is not populated - by Apache. This change was made to comply with the CGI specification. - Please refer to bug #23610 for further information. - -6. Starting PHP 5.0.0 the T_ML_CONSTANT constant is no longer defined by the - ext/tokenizer extension. If error_reporting is set to E_ALL notices will - be produced. Instead of T_ML_CONSTANT for /* */ the T_COMMENT constant - is used, thus both // and /* */ are resolved as the T_COMMENT constant. - However the PHPDoc style comments /** */ ,which starting PHP 5 are parsed - by PHP, are recongnized as T_DOC_COMMENT. - -7. $_SERVER should be populated with argc and argv if variables_order - includes "S". If you have specifically configured your system to not - create $_SERVER, then of course it shouldn't be there. The change was to - always make argc and argv available in the CLI version regardless of the - variables_order setting. As in, the CLI version will now always populate - the global $argc and $argv variables. - -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 - $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 - -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. Expect the - same behaviour from get_parent_class() when applicable. - Example : - <?php - class FooBar { - } - class ExtFooBar extends FooBar{} - $a = new FooBar(); - var_dump(get_class($a), get_parent_class($a)); - ?> - - Output (PHP 4): - string(6) "foobar" - string(9) "extfoobar" - - Output (PHP 5): - string(6) "FooBar" - string(9) "ExtFooBar" - ---------------------------------------------------------------------- - Example code that will break : - //.... - function someMethod($p) { - if (get_class($p) != 'helpingclass') { - return FALSE; - } - //... - } - //... - Possible solution is to search for get_class() and get_parent_class() in - all your scripts and use strtolower(). - -10. get_class_methods() returns the names of the methods of a class as they - declared. In PHP4 the names are all lowercased. - Example code : - <?php - class Foo{ - function doFoo(){} - function hasFoo(){} - } - var_dump(get_class_methods("Foo")); - ?> - Output (PHP4): - array(2) { - [0]=> - string(5) "dofoo" - [1]=> - string(6) "hasfoo" - } - Output (PHP5): - array(2) { - [0]=> - string(5) "doFoo" - [1]=> - string(6) "hasFoo" - } - -11. Assignment $this is impossible. Starting PHP 5.0.0 $this has special - meaning in class methods and is recognized by the PHP parser. The latter - will generate a parse error when assignment to $this is found - Example code : - <?php - class Foo { - function assignNew($obj) { - $this = $obj; - } - } - $a = new Foo(); - $b = new Foo(); - $a->assignNew($b); - echo "I was executed\n"; - ?> - Output (PHP 4): - I was executed - Output (PHP 5): - PHP Fatal error: Cannot re-assign $this in /tmp/this_ex.php on line 4 - -- PHP CVS Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
