What's the fastest way to uninstall devtools on Mac OS X?

Open Terminal.app and then copy & paste the following command:

sudo /Developer/Library/uninstall-devtools –mode=all

Note that a full uninstall like this will take some time to complete.

Does PHP have an array_map_recursive function that gives my callback access to the array's keys?

No. However, you can add this functionality to your project via the following code:

<?php
function array_map_recursive(Array &$arr, $fnMap)
{
    $fnHelper = function (Array $arr, $fnMap, $fnHelper)
    {
        $result = array();
        foreach ($arr as $key => $value)
        {
            if (is_array($value))
            {
                $fnMap($key, $null = NULL, $isKeyOnly = TRUE);
                $result[$key] = $fnHelper($value, $fnMap, $fnHelper);
                continue;
            }
            $fnMap($key, $value, $isKeyOnly = FALSE);
            $result[$key] = $value;
        }
        return $result;
    };
    $arr = $fnHelper($arr, $fnMap, $fnHelper);
}

Note that array_walk_recursive provides similar functionality but falls short of our requirements due to the following caveat copy and pasted directly from php.net:

"You may notice that the key 'sweet' is never displayed. Any key that holds an array will not be passed to the function."

Example usage would look like:

<?php
// EXAMPLE CALLBACK
$urldecode = function (&$key, &$value, $isKeyOnly) // NOTE THE 3 ARGS AND THE FACT THAT THE FIRST TWO ARE BY REF
{
    $key = urldecode($key);
    $value = urldecode($value);
};

// EXAMPLE DATA
$data = array(
    '%21' => '%21',
    '%40' => '%40',
    '%23' => array(
        '1' => '%23',
        '3' => '%23',
        '2' => '%23',
    ),
    '%24' => '%24',
    '%25' => '%25',
    '%5E' => '%5E',
    '%26' => '%26',
    '%2A' => '%2A',
);

// DEMO...
echo "BEFORE:\n";
print_r($data);
array_map_recursive($data, $urldecode);
echo "\nAFTER:\n";
print_r($data);

/*
THE EXAMPLE CODE ABOVE OUTPUTS:

BEFORE:
Array
(
    [%21] => %21
    [%40] => %40
    [%23] => Array
    (
        [1] => %23
        [3] => %23
        [2] => %23
    )
    [%24] => %24
    [%25] => %25
    [%5E] => %5E
    [%26] => %26
    [%2A] => %2A
)

AFTER:
Array
    (
    [!] => !
    [@] => @
    [#] => Array
    (
        [1] => #
        [3] => #
        [2] => #
    )
    [$] => $
    [%] => %
    [^] => ^
    [&] => &
    [*] => *
)
*/

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What's the fastest way to locate a WORD in a file via the command line?

cat path/to/your/file.txt | grep the_word_you_want_to_find

This technique comes in handy when you're trying to locate a certain configuration directive within a configuration file (as illustrated in the following example):

cat /etc/php5/apache2/php.ini | grep upload_max_filesize
upload_max_filesize = 2M

What's the fastest way to locate a FILE via the command line?

find / -name 'file.txt'

This technique comes in handy when you're trying to locate certain configuration files (as illustrated in the following example):

find / -name 'php.ini'
/Applications/MAMP/bin/php/php5.2.17/conf/php.ini
/Applications/MAMP/bin/php/php5.3.6/conf/php.ini

How can I tell which user Apache is running as using PHP?

Create a file in your root web directory named whoami.php with the following code inside:

<?php
echo shell_exec('whoami');

Then, access whoami.php using your browser at an address such as:

http://YOURdomain.com/whoami.php

The name of the user Apache is running as will be displayed in your browser.

When you're finished testing, delete whoami.php.

How can I capture user input from the cmd line using PHP?

Copy and paste the following command into your shell to create a new file in your current directory:

vim example.php

Copy and paste the following text into your new example.php file:

<?php
$name = trim(shell_exec("read -p 'Enter your name: ' name\necho \$name"));
echo "Hello $name this is PHP speaking\n";
exit;

Save the example.php file.

Next, experience your new PHP program (example.php) capture your user input from the cmd line by copying and pasting the following command into your shell:

php example.php

It will prompt you with the following:

Enter your name: 

You will type your name and then hit enter as shown here:

Enter your name: John

After you hit enter you'll see the PHP program we wrote print out the following text:

Hello John this is PHP speaking

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How do I add syntax highlighting to my Blogger blog?

Step 1) Via Blogger's admin panel, navigate to your "Template" section

Step 2) Click "Edit HTML"

Step 3) Accept the warning by clicking "Proceed"

Step 4) Find your template's </head> tag

Step 5) Copy and paste the following HTML code (omit the .js includes that aren't relevant to your site to increase page load time):

<!-- Syntax Highlighter Additions START -->
<link href="http://alexgorbatchev.com/pub/sh/current/styles/shCore.css" rel="stylesheet" type="text/css" />
<link href="http://alexgorbatchev.com/pub/sh/current/styles/shThemeEmacs.css" rel="stylesheet" type="text/css" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shCore.js" type="text/javascript" />

<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushAS3.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushBash.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushColdFusion.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCSharp.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCpp.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCss.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushDelphi.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushDiff.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushErlang.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushGroovy.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJScript.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJava.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJavaFX.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPerl.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPhp.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPlain.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPowerShell.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPython.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushRuby.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushScala.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushSql.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushVb.js" type="text/javascript" />
<script src="http://alexgorbatchev.com/pub/sh/current/scripts/shBrushXml.js" type="text/javascript" />
 
<script language="javascript" type="text/javascript">
 SyntaxHighlighter.config.bloggerMode = true;
 SyntaxHighlighter.all();
</script>
<!-- Syntax Highlighter Additions END -->

Step 6) Click "Save template"

Step 7) Click "Close"

Step 8) Create a new post in HTML mode using the following markup:

<pre class="brush:php;">
&lt;?php
$example = range(0, 9);
foreach ($example as $value)
{
 echo $value;
}
</pre>

Step 9) Click "Publish" and you're done!

Additional information on the syntax highlighting code utilized on this blog and illustrated in this tutorial can be found at http://alexgorbatchev.com/SyntaxHighlighter/.

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