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58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
1 1. strrpos() and strripos() now use the entire string as a needle. Be aware
2 that the existing scripts may no longer work as you expect.
61e6cd2 Reorganization.
Moriyoshi Koizumi authored
3
1fa7458 A small start for so called "not-yet-written faq" about small changes…
Andrey Hristov authored
4 EX :
5 <?php
6 var_dump(strrpos("ABCDEF","DEF"));
7 var_dump(strrpos("ABCDEF","DAF"));
8 ?>
32f41d1 add an example for illegal string offset. the example is stolen from …
Andrey Hristov authored
9
61e6cd2 Reorganization.
Moriyoshi Koizumi authored
10 Will give you different results. The former returns 3 while the latter
11 returns false rather than the position of the last occurrence of 'D'.
12 The same applies to strripos().
13
14 2. Illegal use of string offsets causes E_ERROR instead of E_WARNING.
15
32f41d1 add an example for illegal string offset. the example is stolen from …
Andrey Hristov authored
16 EX :
61e6cd2 Reorganization.
Moriyoshi Koizumi authored
17 <?php
18 $a = "foo";
19 unset($a[0][1][2]);
20 ?>
21
22 Fatal error: Cannot use string offset as an array in ... on line 1
32f41d1 add an example for illegal string offset. the example is stolen from …
Andrey Hristov authored
23
61e6cd2 Reorganization.
Moriyoshi Koizumi authored
24 3. array_merge() was changed to accept only arrays. If a non-array variable is
25 passed, a E_WARNING will be thrown for every such parameter. Be careful
26 because your code may start emitting E_WARNING out of the blue.
32f41d1 add an example for illegal string offset. the example is stolen from …
Andrey Hristov authored
27
61e6cd2 Reorganization.
Moriyoshi Koizumi authored
28 4. Be careful when porting from ext/mysql to ext/mysqli. The following
29 functions return NULL when no more data is available in the result set
30 (ext/mysql's functions return FALSE).
31
32 - mysqli_fetch_row()
33 - mysqli_fetch_array()
34 - mysqli_fetch_assoc()
5ce35b8 Note about Apache2 SAPI change.
Moriyoshi Koizumi authored
35
36 5. PATH_TRANSLATED server variable is no longer set implicitly under
f4983c0 - Renamed all *php4* files to *php5*, changed all php4/PHP4 to php5/PHP5
foobar authored
37 Apache2 SAPI in contrast to the situation in PHP 4, where it is set to the
5ce35b8 Note about Apache2 SAPI change.
Moriyoshi Koizumi authored
38 same value as the SCRIPT_FILENAME server variable when it is not populated
39 by Apache. This change was made to comply with the CGI specification.
40 Please refer to bug #23610 for further information.
61e6cd2 Reorganization.
Moriyoshi Koizumi authored
41
7baf31f another example
Andrey Hristov authored
42 6. Starting PHP 5.0.0 the T_ML_CONSTANT constant is no longer defined by the
43 ext/tokenizer extension. If error_reporting is set to E_ALL notices will
44 be produced. Instead of T_ML_CONSTANT for /* */ the T_COMMENT constant
45 is used, thus both // and /* */ are resolved as the T_COMMENT constant.
3bf293f @andigutmans - Change from PHP5 -> PHP 5
andigutmans authored
46 However the PHPDoc style comments /** */ ,which starting PHP 5 are parsed
d5d2d9e Clarification about phpDoc comments. Spotted by Greag Beaver.
Andrey Hristov authored
47 by PHP, are recongnized as T_DOC_COMMENT.
1a55992 adding info about $argc and $argv in CLI mode
Andrey Hristov authored
48
0fa195d use Rasmus' words
Andrey Hristov authored
49 7. $_SERVER should be populated with argc and argv if variables_order
50 includes "S". If you have specifically configured your system to not
51 create $_SERVER, then of course it shouldn't be there. The change was to
52 always make argc and argv available in the CLI version regardless of the
53 variables_order setting. As in, the CLI version will now always populate
54 the global $argc and $argv variables.
85de35e Adding note about declaration first use after that for classes.
Andrey Hristov authored
55
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
56 8. In some cases classes must be declared before used. It only happens only
57 if some of the new features of PHP 5 are used. Otherwise the behaviour is
58 the old.
59 Example 1 (works with no errors):
85de35e Adding note about declaration first use after that for classes.
Andrey Hristov authored
60 <?php
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
61 $a = new a();
62 class a {
63 }
64 ?>
65
66 Example 2 (throws an error):
67 <?php
68 $a = new a();
69 interface b{
70 }
71 class a implements b {
72 }
73 ?>
74
75 Output (example 2) :
76 Fatal error: Class 'a' not found in /tmp/cl.php on line 2
85de35e Adding note about declaration first use after that for classes.
Andrey Hristov authored
77
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
78 9. get_class() starting PHP 5 returns the name of the class as it was
79 declared which may lead to problems in older scripts that rely on
b8b1b35 new incompatibilities. maybe someone from the doc group will update the
Andrey Hristov authored
80 the previous behaviour - the class name is lowercased. Expect the
81 same behaviour from get_parent_class() when applicable.
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
82 Example :
83 <?php
84 class FooBar {
85de35e Adding note about declaration first use after that for classes.
Andrey Hristov authored
85 }
b8b1b35 new incompatibilities. maybe someone from the doc group will update the
Andrey Hristov authored
86 class ExtFooBar extends FooBar{}
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
87 $a = new FooBar();
b8b1b35 new incompatibilities. maybe someone from the doc group will update the
Andrey Hristov authored
88 var_dump(get_class($a), get_parent_class($a));
85de35e Adding note about declaration first use after that for classes.
Andrey Hristov authored
89 ?>
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
90
91 Output (PHP 4):
92 string(6) "foobar"
b8b1b35 new incompatibilities. maybe someone from the doc group will update the
Andrey Hristov authored
93 string(9) "extfoobar"
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
94
95 Output (PHP 5):
96 string(6) "FooBar"
b8b1b35 new incompatibilities. maybe someone from the doc group will update the
Andrey Hristov authored
97 string(9) "ExtFooBar"
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
98 ----------------------------------------------------------------------
99 Example code that will break :
100 //....
101 function someMethod($p) {
102 if (get_class($p) != 'helpingclass') {
103 return FALSE;
104 }
105 //...
106 }
107 //...
b8b1b35 new incompatibilities. maybe someone from the doc group will update the
Andrey Hristov authored
108 Possible solution is to search for get_class() and get_parent_class() in
109 all your scripts and use strtolower().
110
111 10. get_class_methods() returns the names of the methods of a class as they
112 declared. In PHP4 the names are all lowercased.
113 Example code :
114 <?php
115 class Foo{
116 function doFoo(){}
117 function hasFoo(){}
118 }
119 var_dump(get_class_methods("Foo"));
120 ?>
121 Output (PHP4):
122 array(2) {
123 [0]=>
124 string(5) "dofoo"
125 [1]=>
126 string(6) "hasfoo"
127 }
128 Output (PHP5):
129 array(2) {
130 [0]=>
131 string(5) "doFoo"
132 [1]=>
133 string(6) "hasFoo"
134 }
135
136 11. Assignment $this is impossible. Starting PHP 5.0.0 $this has special
137 meaning in class methods and is recognized by the PHP parser. The latter
138 will generate a parse error when assignment to $this is found
139 Example code :
140 <?php
141 class Foo {
142 function assignNew($obj) {
143 $this = $obj;
144 }
145 }
146 $a = new Foo();
147 $b = new Foo();
148 $a->assignNew($b);
149 echo "I was executed\n";
150 ?>
151 Output (PHP 4):
152 I was executed
153 Output (PHP 5):
154 PHP Fatal error: Cannot re-assign $this in /tmp/this_ex.php on line 4
58a52b1 - Fixed the explanation and example about "classes must be declared b…
Andrey Hristov authored
155
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