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Text Editor which shows \r\n? [closed]
...han installing any application for sure. In command line with proper setup PHP
php -q
<?php $t=file_get_contents("filename"); echo str_replace(array("\n", "\r"), array("\\n", "\\r"), $t); ?>
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What is the difference between the | and || or operators?
I have always used || (two pipes) in OR expressions, both in C# and PHP. Occasionally I see a single pipe used: | . What is the difference between those two usages? Are there any caveats when using one over the other or are they interchangeable?
...
What is the difference between window, screen, and document in Javascript?
...at about the document object then? The document object is your html, aspx, php, or other document that will be loaded into the browser. The document actually gets loaded inside the window object and has properties available to it like title, URL, cookie, etc. What does this really mean? That means i...
Real escape string and PDO [duplicate]
...escape_string() with the PDO::quote() method.
Here is an excerpt from the PHP website:
<?php
$conn = new PDO('sqlite:/home/lynn/music.sql3');
/* Simple string */
$string = 'Nice';
print "Unquoted string: $string\n";
print "Quoted string: " . $conn->quote($string) . "\n";...
App Inventor 2 向心力实验App - 探究向心力F与角速度ω、半径r、质量m的关...
...csv")
六、实验操作步骤
6.1 准备工作
1. 在手机上安装向心力实验App
2. 准备一个旋转装置（如沙拉甩干机、小型旋转台、手摇转盘）
3. 准备手机固定支架
4. 准备不同质量的物体（如砝码，用于验证 F 与 m 的关系）
6....
What is base 64 encoding used for?
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In a langange like php, were will binary data come from. We almost always work with string data which is text.
– Cholthi Paul Ttiopic
Sep 5 '16 at 14:02
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正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
....Net下的工具 正则表达式测试器。请参考该页面的说明来安装和运行该软件。
下面是Regex Tester运行时的截图：
元字符
现在你已经知道几个很有用的元字符了，如\b,.,*，还有\d.正则表达式里还有更多的元字符，比如\s匹配任意...
How to get all columns' names for all the tables in MySQL?
...
<?php
$table = 'orders';
$query = "SHOW COLUMNS FROM $table";
if($output = mysql_query($query)):
$columns = array();
while($result = mysql_fetch_assoc($output)):
$...
Find and replace with sed in directory and sub directories
... worked for me:
find ./ -type f -exec sed -i '' 's#NEEDLE#REPLACEMENT#' *.php {} \;
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