PHP在很多时候不适合做常驻的SHELl进程, 他没有专门的gc例程, 也没有有效的内存管理途径. 所以如果用PHP做常驻SHELL, 你会经常被内存耗尽导致abort而unhappy.
而且, 如果输入数据非法, 而SHELL没有检测, 导致abort, 也会让你很不开心.
那? 怎么办呢?
多进程....
Filed in PHP应用
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项目遇到一个问题,不同的终端运行结果不同.
究其原因, 是因为使用了和locale相关的一些函数, 并且终端locale不同所致, 总结了这些函数如下:
Filed in PHP应用
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最近要安排我为BIT提供的《PHP高级应用--关于PHP你不知道的》一门课的讲课素材, 其中有部分涉及到PHP和Gtk2开发桌面应用的部分, 于是抽空就想写一了一个demo出来.
这是一个经典的求24的算法的PHP实现, 加上了Gtk2的界面, 其实也没什么复杂的, 和MFC开发没什么太大的区别， 唯一的不爽， 就是要自己用代码来写布局。。。
有兴趣的同学可以看看.
Filed in PHP应用
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我看到过很多人操作数组的时候, 对于数组中的非数字键名不使用引号,
$array[key] = $value;
我可以理解有些人可能会觉得这样的代码很"整洁", 并且也能正常执行.
更甚至,如果他很"幸运的"php配置的好:
error_reporting = ~E_NOTICE
他也许永远都沉浸在自己的"整洁"风格中, 看不到任何的NOTICE提示, 也不会意识到, 他这么做, 能损失多少的性能~
来, 我们一起来看看:
最近再总结一些PHP的规范, 想起之前在Y!的时候的API描述自动生成工具, 翻到了phpDocumentor, 用起来感觉还是很方便 , 就安装到使用的过程写下来, 与大家分享
with 13 Comments你知道怎么写出最快的循环么?
刚刚在晓东郭的blog看到一个有趣的问题" PHP中 $i++ 和 ++$i 的区别 ", 有趣的导致我做了下解答....
Filed in PHP应用
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我们在代码中用的最多的逻辑是什么?
你知道如下的几段代码的布尔结果分别是什么么?
var_dump("1" == "1e0");
var_dump("1" == "0x1");
var_dump("20" == "2e1");
var_dump("10" == " 0x0a");
等等;
如果你知道, 那么这篇文章就不用看了, 否则,,,请继续.
Filed in PHP应用
with 11 Comments
恩,这段代码还能再乱点,再让人无语点么?
<?php
/* @author: laruence<laruence.yahoo.com.cn> */
$___="000010000009000009000074000117000115000116000032000079000110000101000032000076000097000115000116000032000068000097000110000099000101000032000010000074000117000115000116000032000111000110000101000032000108000097000115000116000032000100000097000110000099000101000046000046000046000046000111000104000032000098000097000098000121000046000046000046000106000117000115000116000032000111000110000101000032000108000097000115000116000032000100000097000110000099000101000032000010000010000087000101000032000109000101000101000116000032000105000110000032000116000104000101000032000110000105000103000104000116000032000105000110000032000116000104000101000032000083000112000097000110000105000115000104000032000099000097000102000195000169000032000010000073000032000108000111000111000107000032000105000110000032000121000111000117000114000032000101000121000101000115000032000106000117000115000116000032000100000111000110000039000039000116000032000107000110000111000119000032000119000104000097000116000032000116000111000032000115000097000121000032000010000073000116000032000102000101000101000108000115000032000108000105000107000101000032000073000039000039000109000032000100000114000111000119000110000105000110000103000032000105000110000032000115000097000108000116000121000032000119000097000116000101000114000032000010000065000032000102000101000119000032000104000111000117000114000115000032000108000101000102000116000032000116000105000108000108000032000116000104000101000032000115000117000110000039000039000115000032000103000111000110000110000097000032000114000105000115000101000032000010000116000111000109000111000114000114000111000119000032000119000105000108000108000032000099000111000109000101000032000097000110000032000105000116000039000039000115000032000116000105000109000101000032000116000111000032000114000101000097000108000105000122000101000032000010000111000117000114000032000108000111000118000101000032000104000097000115000032000102000105000110000105000115000104000101000100000032000102000111000114000101000118000101000114000032000010000010000104000111000119000032000073000032000119000105000115000104000032000116000111000032000099000111000109000101000032000119000105000116000104000032000121000111000117000032000040000119000105000115000104000032000116000111000032000099000111000109000101000032000119000105000116000104000032000121000111000117000041000032000010000104000111000119000032000073000032000119000105000115000104000032000119000101000032000109000097000107000101000032000105000116000032000116000104000114000111000117000103000104000032000010000010000074000117000115000116000032000111000110000101000032000108000097000115000116000032000100000097000110000099000101000032000010000098000101000102000111000114000101000032000119000101000032000115000097000121000032000103000111000111000100000098000121000101000032000010000119000104000101000110000032000119000101000032000115000119000097000121000032000097000110000100000032000116000117000114000110000032000114000111000117000110000100000032000097000110000100000032000114000111000117000110000100000032000097000110000100000032000114000111000117000110000100000032000010000105000116000039000039000115000032000108000105000107000101000032000116000104000101000032000102000105000114000115000116000032000116000105000109000101000032000010000074000117000115000116000032000111000110000101000032000109000111000114000101000032000099000104000097000110000099000101000032000010000104000111000108000100000032000109000101000032000116000105000103000104000116000032000097000110000100000032000107000101000101000112000032000109000101000032000119000097000114000109000032000010000099000097000117000115000101000032000116000104000101000032000110000105000103000104000116000032000105000115000032000103000101000116000116000105000110000103000032000099000111000108000100000032000010000097000110000100000032000073000032000100000111000110000039000039000116000032000107000110000111000119000032000119000104000101000114000101000032000073000032000098000101000108000111000110000103000032000010000074000117000115000116000032000111000110000101000032000108000097000115000116000032000100000097000110000099000101000032000010000010000084000104000101000032000119000105000110000101000032000097000110000100000032000116000104000101000032000108000105000103000104000116000115000032000097000110000100000032000116000104000101000032000083000112000097000110000105000115000104000032000103000117000105000116000097000114000032000010000073000039000039000108000108000032000110000101000118000101000114000032000102000111000114000103000101000116000032000104000111000119000032000114000111000109000097000110000116000105000099000032000116000104000101000121000032000097000114000101000032000010000098000117000116000032000073000032000107000110000111000119000044000032000116000111000109000111000114000114000111000119000032000073000039000039000108000108000032000108000111000115000101000032000116000104000101000032000111000110000101000032000073000032000108000111000118000101000032000010000084000104000101000114000101000039000039000115000032000110000111000032000119000097000121000032000116000111000032000099000111000109000101000032000119000105000116000104000032000121000111000117000032000010000105000116000039000039000115000032000116000104000101000032000111000110000108000121000032000119000097000121000032000116000111000032000100000111000032000010000010000074000117000115000116000032000111000110000101000032000108000097000115000116000032000100000097000110000099000101000044000032000106000117000115000116000032000111000110000101000032000109000111000114000101000032000099000104000097000110000099000101000044000032000106000117000115000116000032000111000110000101000032000108000097000115000116000032000100000097000110000099000101000010000010000009000009000009000009000009000009000009000009000045000045000045000084000104000105000115000032000083000099000114000105000112000116000032000105000115000032000106000117000115000116000032000102000111000114000032000073000079000080000067000067000032000010000009000009000009000009000009000009000009000009000009000009000009000108000097000114000117000101000110000099000101000032000050000048000048000057000046000048000049000046000048000055"; $_______="\x70\x61\x63\x6b";$________=$_______("\x63\x36",115,116,114,108,101,110);$_=$________($________);$__________=$_______("\x63\x36",115,117,98,115,116,114);$_________=$_______("\x63\x36",105,110,116,118,97,108);$________($________);$__=$_______("\x63\x36",111,114,100,99,104,114);$___________=$_______("\x63\x35",119,104,105,108,101);while($____=$__________($___,$_______=$_________($_______),$_)){$_____=$__________($__,3,3);echo$_____($_________($____));while($_--){$_______++;}$_=$________($________);}?>
想知道这段代码干了什么么?
Filed in PHP应用
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foreach是PHP中很常用的一个用作数组循环的控制语句。
因为它的方便和易用，自然也就在后端隐藏着很复杂的具体实现方式：（对用户透明）
今天，我们就来一起分析分析，foreach是如何实现数组（对象）的遍历的。
本节内容涉及到较多编译原理（lex and yacc）的知识，所以如果您觉得看不太懂，可以先找相关的资料看看。