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Full Discussion: Variable definition
Top Forums UNIX for Advanced & Expert Users Variable definition Post 302874085 by greet_sed on Thursday 14th of November 2013 05:26:15 AM
Old 11-14-2013
See here

Example shows how it works :
Code:
A=30
B=40
echo ${A:-B} 
30
A=""
echo ${A:-B}
B
echo {A:-$B}
{A:-40}

 

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RAWURLENCODE(3) 							 1							   RAWURLENCODE(3)

rawurlencode - URL-encode according to RFC 3986

SYNOPSIS
string rawurlencode (string $str) DESCRIPTION
Encodes the given string according to RFC 3986. PARAMETERS
o $str - The URL to be encoded. RETURN VALUES
Returns a string in which all non-alphanumeric characters except -_.~ have been replaced with a percent ( %) sign followed by two hex dig- its. This is the encoding described in RFC 3986 for protecting literal characters from being interpreted as special URL delimiters, and for protecting URLs from being mangled by transmission media with character conversions (like some email systems). Note Prior to PHP 5.3.0, rawurlencode encoded tildes ( ~) as per RFC 1738. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.4 | | | | | | | Tilde characters are no longer encoded when | | | rawurlencode(3) is used with EBCDIC strings. | | | | | 5.3.0 | | | | | | | Now conforms to RFC 3986. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 including a password in an FTP URL <?php echo '<a href="ftp://user:', rawurlencode('foo @+%/'), '@ftp.example.com/x.txt">'; ?> The above example will output: <a href="ftp://user:foo%20%40%2B%25%2F@ftp.example.com/x.txt"> Or, if you pass information in a PATH_INFO component of the URL: Example #2 rawurlencode(3) example 2 <?php echo '<a href="http://example.com/department_list_script/', rawurlencode('sales and marketing/Miami'), '">'; ?> The above example will output: <a href="http://example.com/department_list_script/sales%20and%20marketing%2FMiami"> SEE ALSO
rawurldecode(3), urldecode(3), urlencode(3), RFC 3986. PHP Documentation Group RAWURLENCODE(3)
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