【php】使用phpdbg来调试php程序,phpdbg调试php程序_PHP教程
【php】使用phpdbg来调试php程序,phpdbg调试php程序
PHPDBG是一个PHP的SAPI模块,可以在不用修改代码和不影响性能的情况下控制PHP的运行环境
可以在PHP5.4和之上版本中使用。在PHP5.6和之上版本将内部集成
功能
- 单步调试
- 灵活的下断点方式(类方法、函数、文件:行、内存地址、opcode)
- 可直接调用php的eval
- 可以查看当前执行的代码
- 用户空间API(userland/user space)
- 方便集成
- 支持指定php配置文件
- JIT全局变量
- readline支持(可选),终端操作更方便
- 远程debug,使用java GUI
- 操作简便(具体看help)
安装
如果是PHP56一下
cd /usr/src/php-src/sapi git clone https://github.com/krakjoe/phpdbg cd ../ ./buildconf --force ./config.nice make -j8 make install-phpdbg
PHP56的话直接启用phpdbg就可以了
注意: php 配置中可以启用 --with-readline for phpdbg to support history, autocompletion, tab-listing etc
查看版本号
[root@localhost ~]# php -v PHP 5.6.16 (cli) (built: Dec 8 2015 09:10:23) (DEBUG) Copyright (c) 1997-2015 The PHP Group Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans [root@localhost ~]# phpdbg -V phpdbg 0.4.0 (built: Dec 8 2015 09:10:43) PHP 5.6.16, Copyright (c) 1997-2015 The PHP Group Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans
查看help
[root@localhost ~]# phpdbg [Welcome to phpdbg, the interactive PHP debugger, v0.4.0] To get help using phpdbg type "help" and press enter [Please report bugs to <http://github.com/krakjoe/phpdbg/issues>] phpdbg> help phpdbg is a lightweight, powerful and easy to use debugging platform for PHP5.4+ It supports the following commands: Information list list PHP source info displays information on the debug session print show opcodes frame select a stack frame and print a stack frame summary back shows the current backtrace help provide help on a topic Starting and Stopping Execution exec set execution context run attempt execution step continue execution until other line is reached continue continue execution until continue execution up to the given location finish continue up to end of the current execution frame leave continue up to end of the current execution frame and halt after the calling instruction break set a breakpoint at the specified target watch set a watchpoint on $variable clear clear one or all breakpoints clean clean the execution environment Miscellaneous set set the phpdbg configuration source execute a phpdbginit script register register a phpdbginit function as a command alias sh shell a command ev evaluate some code quit exit phpdbg Type help <command> or (help alias) to get detailed help on any of the above commands, for example help list or h l. Note that help will also match partial commands if unique (and list out options if not unique), so help clea will give help on the clean command, but help cl will list the summary for clean and clear. Type help aliases to show a full alias list, including any registered phpdginit functions Type help syntax for a general introduction to the command syntax. Type help options for a list of phpdbg command line options. Type help phpdbginit to show how to customise the debugger environment. phpdbg> help list Command: list Alias: l lists some code The list command displays source code for the given argument. The target type is specficied by a second subcommand keyword: Type Alias Purpose lines l List N lines from the current execution point func f List the complete source for a specified function method m List the complete source for a specified class::method class c List the complete source for a specified class Note that the context of lines, func and method can be determined by parsing the argument, so these subcommands are optional. However, you must specify the class keyword to list off a class. Examples phpdbg> list 2 phpdbg> l l 2 List the next 2 lines from the current file phpdbg> list my_function phpdbg> l f my_function List the source of the function my_function phpdbg> list func .mine phpdbg> l f .mine List the source of the method mine from the active class in scope phpdbg> list m my::method phpdbg> l my::method List the source of my::method phpdbg> list c myClass phpdbg> l c myClass List the source of myClass Note that functions and classes can only be listed if the corresponding classes and functions table in the Zend executor has a corresponding entry. You can use the compile command to populate these tables for a given execution context. phpdbg> help break Command: break Alias: b set breakpoint Breakpoints can be set at a range of targets within the execution environment. Execution will be paused if the program flow hits a breakpoint. The break target can be one of the following types: Target Alias Purpose at A specify breakpoint by location and condition del d delete breakpoint by breakpoint identifier number Break at takes two arguments. The first is any valid target. The second is a valid PHP expression which will trigger the break in execution, if evaluated as true in a boolean context at the specified target. Note that breakpoints can also be disabled and re-enabled by the set break command. Examples phpdbg> break test.php:100 phpdbg> b test.php:100 Break execution at line 100 of test.php phpdbg> break 200 phpdbg> b 200 Break execution at line 200 of the currently PHP script file phpdbg> break \mynamespace\my_function phpdbg> b \mynamespace\my_function Break execution on entry to \mynamespace\my_function phpdbg> break classX::method phpdbg> b classX::method Break execution on entry to classX::method phpdbg> break 0x7ff68f570e08 phpdbg> b 0x7ff68f570e08 Break at the opline at the address 0x7ff68f570e08 phpdbg> break my_function#14 phpdbg> b my_function#14 Break at the opline #14 of the function my_function phpdbg> break \my\class::method#2 phpdbg> b \my\class::method#2 Break at the opline #2 of the method \my\class::method phpdbg> break test.php:#3 phpdbg> b test.php:#3 Break at opline #3 in test.php phpdbg> break if $cnt > 10 phpdbg> b if $cnt > 10 Break when the condition ($cnt > 10) evaluates to true phpdbg> break at phpdbg::isGreat if $opt == 'S' phpdbg> break @ phpdbg::isGreat if $opt == 'S' Break at any opcode in phpdbg::isGreat when the condition ($opt == 'S') is true phpdbg> break at test.php:20 if !isset($x) Break at every opcode on line 20 of test.php when the condition evaluates to true phpdbg> break ZEND_ADD phpdbg> b ZEND_ADD Break on any occurence of the opcode ZEND_ADD phpdbg> break del 2 phpdbg> b ~ 2 Remove breakpoint 2 Note: Conditional breaks are costly in terms of runtime overhead. Use them only when required as they significantly slow execution. Note: An address is only valid for the current compilation. phpdbg> help watch Command: watch Alias: w set watchpoint Sets watchpoints on variables as long as they are defined Passing no parameter to watch, lists all actually active watchpoints Format for $variable $var Variable $var $var[] All array elements of $var $var-> All properties of $var $var->a Property $var->a $var[b] Array element with key b in array $var Subcommands of watch: Type Alias Purpose array a Sets watchpoint on array/object to observe if an entry is added or removed recursive r Watches variable recursively and automatically adds watchpoints if some entry is added to an array/object delete d Removes watchpoint Note when recursive watchpoints are removed, watchpoints on all the children are removed too Examples phpdbg> watch List currently active watchpoints phpdbg> watch $array phpdbg> w $array Set watchpoint on $array phpdbg> watch recursive $obj-> phpdbg> w r $obj-> Set recursive watchpoint on $obj-> phpdbg> watch delete $obj->a phpdbg> w d $obj->a Remove watchpoint $obj->a Technical note: If using this feature with a debugger, you will get many segmentation faults, each time when a memory page containing a watched address is hit. You then you can continue, phpdbg will remove the write protection, so that the program can continue. If phpdbg could not handle that segfault, the same segfault is triggered again and this time phpdbg will abort.
这些帮助文档足够了
示例代码 testb 与 testa的输出为什么是这样?
<?php ini_set("memory_limit","-1"); class test{ public function testa(){ $a=1; $b = &$a; return 0 + (++$a) + (++$a); } public function testb(){ $a=1; $b = &$a; return ++$a + (++$a); } public function convert($size) { $unit=array('b','kb','mb','gb','tb','pb'); return @round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i]; } public function allsort($arr){ sort($arr); $len = count($arr)-1; $rs = array(); $rs[] = $arr; $x = $len; while($x > 0){ $y = $x --; if($arr[$x] < $arr[$y]){ $z = $len; while($arr[$x] > $arr[$z]){ $z--; } list($arr[$x],$arr[$z]) = array($arr[$z],$arr[$x]); for($i=$len;$i>$y;$i--,$y++){ list($arr[$i],$arr[$y]) = array($arr[$y],$arr[$i]); } $x = $len; $rs[] = $arr; } } return $rs; } } $s = new test(); $resa = $s->testa(); $resb = $s->testb(); $resc = $s->allsort([1,2,3]); echo $resa,"\n",$resb,"\n"; #print_r($resb);
开始调试
[root@localhost ~]# phpdbg -e kk.php [Welcome to phpdbg, the interactive PHP debugger, v0.4.0] To get help using phpdbg type "help" and press enter [Please report bugs to <http://github.com/krakjoe/phpdbg/issues>] [Attempting compilation of /root/kk.php] [Success]
查看一些当前类的opcode
phpdbg> p c test [User Class: test] Methods (4): L7-13 test::testa() /root/kk.php L7 0xb77b553c ZEND_EXT_NOP <unused> <unused> <unused> L9 0xb77b5558 ZEND_EXT_STMT <unused> <unused> <unused> L9 0xb77b5574 ZEND_ASSIGN $a C0 @0 L10 0xb77b5590 ZEND_EXT_STMT <unused> <unused> <unused> L10 0xb77b55ac ZEND_ASSIGN_REF $b $a @1 L11 0xb77b55c8 ZEND_EXT_STMT <unused> <unused> <unused> L11 0xb77b55e4 ZEND_PRE_INC $a <unused> @2 L11 0xb77b5600 ZEND_ADD C1 @2 @3 L11 0xb77b561c ZEND_PRE_INC $a <unused> @4 L11 0xb77b5638 ZEND_ADD @3 @4 @5 L11 0xb77b5654 ZEND_RETURN @5 <unused> <unused> L13 0xb77b5670 ZEND_EXT_STMT <unused> <unused> <unused> L13 0xb77b568c ZEND_RETURN C2 <unused> <unused> L15-21 test::testb() /root/kk.php L15 0xb77b656c ZEND_EXT_NOP <unused> <unused> <unused> L17 0xb77b6588 ZEND_EXT_STMT <unused> <unused> <unused> L17 0xb77b65a4 ZEND_ASSIGN $a C0 @0 L18 0xb77b65c0 ZEND_EXT_STMT <unused> <unused> <unused> L18 0xb77b65dc ZEND_ASSIGN_REF $b $a @1 L19 0xb77b65f8 ZEND_EXT_STMT <unused> <unused> <unused> L19 0xb77b6614 ZEND_PRE_INC $a <unused> @2 L19 0xb77b6630 ZEND_PRE_INC $a <unused> @3 L19 0xb77b664c ZEND_ADD @2 @3 @4 L19 0xb77b6668 ZEND_RETURN @4 <unused> <unused> L21 0xb77b6684 ZEND_EXT_STMT <unused> <unused> <unused> L21 0xb77b66a0 ZEND_RETURN C1 <unused> <unused> L23-27 test::convert() /root/kk.php L23 0xb77b66ec ZEND_EXT_NOP <unused> <unused> <unused> L23 0xb77b6708 ZEND_RECV <unused> <unused> $size L25 0xb77b6724 ZEND_EXT_STMT <unused> <unused> <unused> L25 0xb77b6740 ZEND_INIT_ARRAY C0 <unused> @0 L25 0xb77b675c ZEND_ADD_ARRAY_ELEMENT C1 <unused> @0 L25 0xb77b6778 ZEND_ADD_ARRAY_ELEMENT C2 <unused> @0 L25 0xb77b6794 ZEND_ADD_ARRAY_ELEMENT C3 <unused> @0 L25 0xb77b67b0 ZEND_ADD_ARRAY_ELEMENT C4 <unused> @0 L25 0xb77b67cc ZEND_ADD_ARRAY_ELEMENT C5 <unused> @0 L25 0xb77b67e8 ZEND_ASSIGN $unit @0 @1 L26 0xb77b6804 ZEND_EXT_STMT <unused> <unused> <unused> L26 0xb77b6820 ZEND_BEGIN_SILENCE <unused> <unused> @2 L26 0xb77b683c ZEND_EXT_FCALL_BEGIN <unused> <unused> <unused> L26 0xb77b6858 ZEND_EXT_FCALL_BEGIN <unused> <unused> <unused> L26 0xb77b6874 ZEND_SEND_VAL C6 <unused> <unused> L26 0xb77b6890 ZEND_EXT_FCALL_BEGIN <unused> <unused> <unused> L26 0xb77b68ac ZEND_EXT_FCALL_BEGIN <unused> <unused> <unused> L26 0xb77b68c8 ZEND_SEND_VAR $size <unused> <unused> L26 0xb77b68e4 ZEND_SEND_VAL C7 <unused> <unused> L26 0xb77b6900 ZEND_DO_FCALL C8 <unused> @3 L26 0xb77b691c ZEND_EXT_FCALL_END <unused> <unused> <unused> L26 0xb77b6938 ZEND_SEND_VAR_NO_REF @3 <unused> <unused> L26 0xb77b6954 ZEND_DO_FCALL C9 <unused> @4 L26 0xb77b6970 ZEND_EXT_FCALL_END <unused> <unused> <unused> L26 0xb77b698c ZEND_ASSIGN $i @4 @5 L26 0xb77b69a8 ZEND_SEND_VAR_NO_REF @5 <unused> <unused> L26 0xb77b69c4 ZEND_DO_FCALL C10 <unused> @6 L26 0xb77b69e0 ZEND_EXT_FCALL_END <unused> <unused> <unused> L26 0xb77b69fc ZEND_DIV $size @6 @7 L26 0xb77b6a18 ZEND_SEND_VAL @7 <unused> <unused> L26 0xb77b6a34 ZEND_SEND_VAL C11 <unused> <unused> L26 0xb77b6a50 ZEND_DO_FCALL C12 <unused> @8 L26 0xb77b6a6c ZEND_EXT_FCALL_END <unused> <unused> <unused> L26 0xb77b6a88 ZEND_END_SILENCE @2 <unused> <unused> L26 0xb77b6aa4 ZEND_CONCAT @8 C13 @9 L26 0xb77b6ac0 ZEND_FETCH_DIM_R $unit $i @10 L26 0xb77b6adc ZEND_CONCAT @9 @10 @11 L26 0xb77b6af8 ZEND_RETURN @11 <unused> <unused> L27 0xb77b6b14 ZEND_EXT_STMT <unused> <unused> <unused> L27 0xb77b6b30 ZEND_RETURN C14 <unused> <unused> L29-54 test::allsort() /root/kk.php L29 0xb77b818c ZEND_EXT_NOP <unused> <unused> <unused> L29 0xb77b81a8 ZEND_RECV <unused> <unused> $arr L30 0xb77b81c4 ZEND_EXT_STMT <unused> <unused> <unused> L30 0xb77b81e0 ZEND_EXT_FCALL_BEGIN <unused> <unused> <unused> L30 0xb77b81fc ZEND_SEND_REF $arr <unused> <unused> L30 0xb77b8218 ZEND_DO_FCALL C0 <unused> @0 L30 0xb77b8234 ZEND_EXT_FCALL_END <unused> <unused> <unused> L31 0xb77b8250 ZEND_EXT_STMT <unused> <unused> <unused> L31 0xb77b826c ZEND_EXT_FCALL_BEGIN <unused> <unused> <unused> L31 0xb77b8288 ZEND_SEND_VAR $arr <unused> <unused> L31 0xb77b82a4 ZEND_DO_FCALL C1 <unused> @1 L31 0xb77b82c0 ZEND_EXT_FCALL_END <unused> <unused> <unused> L31 0xb77b82dc ZEND_SUB @1 C2 @2 L31 0xb77b82f8 ZEND_ASSIGN $len @2 @3 L32 0xb77b8314 ZEND_EXT_STMT <unused> <unused> <unused> L32 0xb77b8330 ZEND_INIT_ARRAY <unused> <unused> @4 L32 0xb77b834c ZEND_ASSIGN $rs @4 @5 L33 0xb77b8368 ZEND_EXT_STMT <unused> <unused> <unused> L33 0xb77b8384 ZEND_ASSIGN_DIM $rs <unused> @6 L33 0xb77b83a0 UNKNOWN $arr @7 <unused> L34 0xb77b83bc ZEND_EXT_STMT <unused> <unused> <unused> L34 0xb77b83d8 ZEND_ASSIGN $x $len @8 L36 0xb77b83f4 ZEND_EXT_STMT <unused> <unused> <unused> L36 0xb77b8410 ZEND_IS_SMALLER C3 $x @9 L36 0xb77b842c ZEND_JMPZ @9 J86 <unused> L37 0xb77b8448 ZEND_EXT_STMT <unused> <unused> <unused> L37 0xb77b8464 ZEND_POST_DEC $x <unused> @10 L37 0xb77b8480 ZEND_ASSIGN $y @10 @11 L38 0xb77b849c ZEND_EXT_STMT <unused> <unused> <unused> L38 0xb77b84b8 ZEND_FETCH_DIM_R $arr $x @12 L38 0xb77b84d4 ZEND_FETCH_DIM_R $arr $y @13 L38 0xb77b84f0 ZEND_IS_SMALLER @12 @13 @14 L38 0xb77b850c ZEND_JMPZ @14 J85 <unused> L39 0xb77b8528 ZEND_EXT_STMT <unused> <unused> <unused> L39 0xb77b8544 ZEND_ASSIGN $z $len @15 L40 0xb77b8560 ZEND_EXT_STMT <unused> <unused> <unused> L40 0xb77b857c ZEND_FETCH_DIM_R $arr $x @16 L40 0xb77b8598 ZEND_FETCH_DIM_R $arr $z @17 L40 0xb77b85b4 ZEND_IS_SMALLER @17 @16 @18 L40 0xb77b85d0 ZEND_JMPZ @18 J44 <unused> L41 0xb77b85ec ZEND_EXT_STMT <unused> <unused> <unused> L41 0xb77b8608 ZEND_POST_DEC $z <unused> @19 L41 0xb77b8624 ZEND_FREE @19 <unused> <unused> L42 0xb77b8640 ZEND_JMP J36 L43 0xb77b865c ZEND_EXT_STMT <unused> <unused> <unused> L43 0xb77b8678 ZEND_FETCH_DIM_R $arr $z @20 L43 0xb77b8694 ZEND_INIT_ARRAY @20 <unused> @21 L43 0xb77b86b0 ZEND_FETCH_DIM_R $arr $x @22 L43 0xb77b86cc ZEND_ADD_ARRAY_ELEMENT @22 <unused> @21 L43 0xb77b86e8 ZEND_FETCH_DIM_TMP_VAR @21 C4 @23 L43 0xb77b8704 ZEND_ASSIGN_DIM $arr $z @24 L43 0xb77b8720 UNKNOWN @23 @25 <unused> L43 0xb77b873c ZEND_FETCH_DIM_TMP_VAR @21 C5 @26 L43 0xb77b8758 ZEND_ASSIGN_DIM $arr $x @27 L43 0xb77b8774 UNKNOWN @26 @28 <unused> L43 0xb77b8790 ZEND_FREE @21 <unused> <unused> L45 0xb77b87ac ZEND_EXT_STMT <unused> <unused> <unused> L45 0xb77b87c8 ZEND_ASSIGN $i $len @29 L45 0xb77b87e4 ZEND_IS_SMALLER $y $i @30 L45 0xb77b8800 ZEND_EXT_STMT <unused> <unused> <unused> L45 0xb77b881c ZEND_JMPZNZ @30 J79 or J66 <unused> L45 0xb77b8838 ZEND_POST_DEC $i <unused> @31 L45 0xb77b8854 ZEND_FREE @31 <unused> <unused> L45 0xb77b8870 ZEND_POST_INC $y <unused> @32 L45 0xb77b888c ZEND_FREE @32 <unused> <unused> L45 0xb77b88a8 ZEND_JMP J58 L46 0xb77b88c4 ZEND_EXT_STMT <unused> <unused> <unused> L46 0xb77b88e0 ZEND_FETCH_DIM_R $arr $y @33 L46 0xb77b88fc ZEND_INIT_ARRAY @33 <unused> @34 L46 0xb77b8918 ZEND_FETCH_DIM_R $arr $i @35 L46 0xb77b8934 ZEND_ADD_ARRAY_ELEMENT @35 <unused> @34 L46 0xb77b8950 ZEND_FETCH_DIM_TMP_VAR @34 C6 @36 L46 0xb77b896c ZEND_ASSIGN_DIM $arr $y @37 L46 0xb77b8988 UNKNOWN @36 @38 <unused> L46 0xb77b89a4 ZEND_FETCH_DIM_TMP_VAR @34 C7 @39 L46 0xb77b89c0 ZEND_ASSIGN_DIM $arr $i @40 L46 0xb77b89dc UNKNOWN @39 @41 <unused> L46 0xb77b89f8 ZEND_FREE @34 <unused> <unused> L47 0xb77b8a14 ZEND_JMP J61 L48 0xb77b8a30 ZEND_EXT_STMT <unused> <unused> <unused> L48 0xb77b8a4c ZEND_ASSIGN $x $len @42 L49 0xb77b8a68 ZEND_EXT_STMT <unused> <unused> <unused> L49 0xb77b8a84 ZEND_ASSIGN_DIM $rs <unused> @43 L49 0xb77b8aa0 UNKNOWN $arr @44 <unused> L50 0xb77b8abc ZEND_JMP J85 L52 0xb77b8ad8 ZEND_JMP J23 L53 0xb77b8af4 ZEND_EXT_STMT <unused> <unused> <unused> L53 0xb77b8b10 ZEND_RETURN $rs <unused> <unused> L54 0xb77b8b2c ZEND_EXT_STMT <unused> <unused> <unused> L54 0xb77b8b48 ZEND_RETURN C8 <unused> <unused> phpdbg>
加断点,开始调试
phpdbg> b test::testa [Breakpoint #0 added at test::testa] phpdbg> b test::testb [Breakpoint #1 added at test::testb] phpdbg> b 0xb77b6614 [Breakpoint #2 added at 0xb77b6614] phpdbg> b 0xb77b6630 [Breakpoint #3 added at 0xb77b6630]
运行、查看代码
phpdbg> r [Breakpoint #0 in test::testa() at /root/kk.php:7, hits: 1] 00006: >00007: public function testa(){ 00008: 00009: $a=1; phpdbg> l test::testa 00007: public function testa(){ 00008: 00009: $a=1; 00010: $b = &$a; 00011: return 0 + (++$a) + (++$a); 00012: 00013: } 00014: phpdbg> p s [Stack in test::testa()] L7-13 test::testa() /root/kk.php L7 0xb77b553c ZEND_EXT_NOP <unused> <unused> <unused> L9 0xb77b5558 ZEND_EXT_STMT <unused> <unused> <unused> L9 0xb77b5574 ZEND_ASSIGN $a C0 @0 L10 0xb77b5590 ZEND_EXT_STMT <unused> <unused> <unused> L10 0xb77b55ac ZEND_ASSIGN_REF $b $a @1 L11 0xb77b55c8 ZEND_EXT_STMT <unused> <unused> <unused> L11 0xb77b55e4 ZEND_PRE_INC $a <unused> @2 L11 0xb77b5600 ZEND_ADD C1 @2 @3 L11 0xb77b561c ZEND_PRE_INC $a <unused> @4 L11 0xb77b5638 ZEND_ADD @3 @4 @5 L11 0xb77b5654 ZEND_RETURN @5 <unused> <unused> L13 0xb77b5670 ZEND_EXT_STMT <unused> <unused> <unused> L13 0xb77b568c ZEND_RETURN C2 <unused> <unused> <br /><br />
继续执行
和gdb一样,phpdbg的继续执行命令也是continue,简写形式为c
查看断点
phpdbg> info b ------------------------------------------------ Method Breakpoints: #0 test::testa #1 test::testb ------------------------------------------------ Opline Breakpoints: #2 0xb77b6614 #3 0xb77b6630
eval操作
可以执行任意的PHP代码
我们可以看到上面例子 testa 与 testb的区别
L7-13 test::testa() /root/kk.php L11 0xb77b55e4 ZEND_PRE_INC $a <unused> @2 L11 0xb77b5600 ZEND_ADD C1 @2 @3 L11 0xb77b561c ZEND_PRE_INC $a <unused> @4 L11 0xb77b5638 ZEND_ADD @3 @4 @5 L15-21 test::testb() /root/kk.php L19 0xb77b6614 ZEND_PRE_INC $a <unused> @2 L19 0xb77b6630 ZEND_PRE_INC $a <unused> @3 L19 0xb77b664c ZEND_ADD @2 @3 @4
区别在于这里 ZEND_PRE_INC 这一个opcode不同,这个opcode就是 ++$a
testb中当引用存在的时候, $a 先自增了两次,然后再加,所以结果为6,这里应该是PHP本身的问题
这个工具比vld丰富多了,PHP会越来越强大的
参考文章
https://github.com/krakjoe/phpdbg

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PHP 구현 프레임워크: ZendFramework 입문 튜토리얼 ZendFramework는 PHP에서 개발하고 현재 ZendTechnologies에서 유지 관리하는 오픈 소스 웹 사이트 프레임워크입니다. ZendFramework는 MVC 디자인 패턴을 채택하고 Web2.0 애플리케이션 및 Web Serve 구현을 지원하기 위한 재사용 가능한 코드 라이브러리 시리즈를 제공합니다. ZendFramework는 PHP 개발자들에게 매우 인기 있고 존경받고 있으며 다양한 기능을 갖추고 있습니다.

Zend Framework에서 권한 제어를 위해 ACL(AccessControlList)을 사용하는 방법 소개: 웹 애플리케이션에서 권한 제어는 중요한 기능입니다. 이는 사용자가 액세스 권한이 있는 페이지와 기능에만 액세스할 수 있도록 하고 무단 액세스를 방지합니다. Zend 프레임워크는 ACL(AccessControlList) 구성 요소를 사용하여 권한 제어를 구현하는 편리한 방법을 제공합니다. 이 기사에서는 Zend Framework에서 ACL을 사용하는 방법을 소개합니다.

PHP가 ZendOptimizer를 인식하지 못합니다. 어떻게 해결합니까? PHP 개발 중에 PHP가 ZendOptimizer를 인식하지 못하는 상황이 발생할 수 있으며, 이로 인해 일부 PHP 코드가 제대로 실행되지 않을 수 있습니다. 이 경우 문제를 해결하기 위해 몇 가지 조치를 취해야 합니다. 아래에는 몇 가지 가능한 해결 방법과 특정 코드 예제가 설명되어 있습니다. 1. ZendOptimizer가 올바르게 설치되었는지 확인: 먼저 ZendOptimizer가 올바르게 설치되었는지 확인해야 합니다.

Windows 2003 설치 패키지에는 Zend, PHP5.2.17, PHPWind8.7 및 PHPMyadmin3.5.2가 포함되어 있습니다. 설치 패키지를 직접 다운로드하여 리소스 검색 시간을 절약할 수 있습니다. 하지만 MySQL은 업로드 제한을 초과했기 때문에 MySQL 공식 웹사이트에 가서 다운로드해야 합니다. 그런 다음 아래와 같이 압축을 풀고 D 드라이브에 복사합니다. MySQLinDdisk WindowsIIS+FTP 설치 및 구성 시작>제어판>프로그램 추가/제거를 클릭합니다.PG 추가 또는 삭제 Windows 구성 요소 추가/제거(A)를 클릭합니다. 추가고르데

인터넷 정보가 폭발적으로 증가함에 따라 검색 엔진은 사람들이 정보를 얻는 데 선호하는 방법 중 하나가 되었습니다. 이제 웹사이트 수가 지속적으로 증가함에 따라 검색엔진의 빠른 응답성과 정확성이 점점 더 중요해지고 있으며, 이에 따라 검색엔진의 고성능이 요구됩니다. 이 글에서는 PHP 프레임워크 Zend를 사용하여 고성능 검색 엔진을 개발하는 방법을 소개하겠습니다. 1. Zend Framework를 사용하는 이유 Zend Framework는 뛰어난 성능과 확장성을 갖춘 고성능 PHP 프레임워크입니다.

정보기술의 급속한 발전으로 인해 점점 더 많은 기업들이 정보관리의 필요성을 깨닫기 시작하고 있습니다. ERP(Enterprise Resource Planning) 관리 플랫폼은 기업이 자원 계획, 협업, 제어, 최적화 및 관리를 실현하는 데 도움이 되는 현대 기업 관리를 위한 중요한 도구입니다. 그 중 PHP 프레임워크 Zend는 개발자가 ERP 시스템을 빠르고 효율적으로 개발하는 데 도움을 줄 수 있는 탁월한 개발 도구입니다. 이 기사에서는 Zend를 사용하여 효율적인 ERP 관리 플랫폼을 개발하는 방법을 소개합니다. 1. 개발 프로세스를 시작하기 전에 요구사항 분석을 결정합니다.

인터넷 애플리케이션이 지속적으로 발전함에 따라 대규모 애플리케이션 개발에 대한 요구도 증가하고 있습니다. 이러한 맥락에서 자신에게 적합한 개발 프레임워크를 선택하는 것이 특히 중요합니다. Laravel과 Zend는 널리 사용되는 두 가지 PHP 프레임워크입니다. 각각 고유한 장점이 있지만 대규모 애플리케이션 개발에 더 적합한 것은 무엇입니까? Laravel은 PHP 개발자가 선호하는 프레임워크 중 하나가 된 인기 있는 개발 프레임워크입니다. 현대적인 디자인 컨셉을 채택하고 EloquentOR과 같은 다양하고 강력한 내장 기능과 도구를 갖추고 있습니다.

PHP는 널리 사용되는 동적 웹 프로그래밍 언어입니다. 개발자는 다양한 프레임워크를 사용하여 웹 개발 작업을 단순화할 수 있습니다. Symfony와 ZendFramework는 PHP에서 가장 인기 있는 프레임워크 중 두 가지입니다. 초보자는 Symfony3와 ZendFramework3 중에서 선택할 때 종종 혼란스러워합니다. 여기서는 이 두 프레임워크를 비교하여 어느 프레임워크를 시작하기 더 쉬운지 살펴보겠습니다. Symfony3Symfony는 MVC 모델을 기반으로 한 PH입니다.
