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PHP Quick Reference
Escape sequences for print output:
\" - double quote \' - single quote \n - new line \t - tab \r - carriage return \$ - dollar sign \\ - backslash
Max integer and float size (overflow):
//on a 32-bit system $large_number = 2147483647; var_dump($large_number); // int(2147483647) $large_number = 2147483648; var_dump($large_number); // float(2147483648) $million = 1000000; $large_number = 50000 * $million; var_dump($large_number); // float(50000000000) //on a 64-bit system $large_number = 9223372036854775807; var_dump($large_number); // int(9223372036854775807) $large_number = 9223372036854775808; var_dump($large_number); // float(9.2233720368548E+18) $million = 1000000; $large_number = 50000000000000 * $million; var_dump($large_number); // float(5.0E+19)
generate random number:
echo rand() . "\n"; echo rand() . "\n"; echo rand(5, 15);
Get Current Page Name:
function curPageName() {
return substr($_SERVER["SCRIPT_NAME"],strrpos($_SERVER["SCRIPT_NAME"],"/")+1);
}
Came across the following on stackoverflow while looking for the PHP equivalent of string.format.
Sprintf (similar to php printf, in c# string.format):
$filter = "content:%1$s title:%1$s^4.0 path.title:%1$s^4.0 description:%1$s ...";
$filter = sprintf($filter, "Cheese");
//OR
function format() {
$args = func_get_args();
if (count($args) == 0) {
return;
}
if (count($args) == 1) {
return $args[0];
}
$str = array_shift($args);
$str = preg_replace_callback('/\\{(0|[1-9]\\d*)\\}/', create_function('$match', '$args = '.var_export($args, true).'; return isset($args[$match[1]]) ? $args[$match[1]] : $match[0];'), $str);
return $str;
}
References
StackOverflow, “C# String.Format() Equivalent in PHP?”,
WebCheatSheet, http://www.webcheatsheet.com/PHP/get_current_page_url.php
PHP.Net, http://php.net
String Formatting
Snippets below have been condensed from their original sources for brevity. See references for original articles.
All examples are in C# .Net.
My own little function:
private string DynamicFormat(string dbformatstring, string contentstring)
{
foreach (string item in dbformatstring.Split(',')) {
string propname = item.Split(':')[0];
string propvalue = item.Split(':')[1];
contentstring = contentstring.Replace("{"+propname+"}",propvalue);
}
return contentstring;
}
Format With extension method by James Newton-King:
public static string FormatWith(this string format, params object[] args)
{
if (format == null)
throw new ArgumentNullException("format");
return string.Format(format, args);
}
public static string FormatWith(this string format, IFormatProvider provider, params object[] args)
{
if (format == null)
throw new ArgumentNullException("format");
return string.Format(provider, format, args);
}
References
James Newton-King, “FormatWith”,http://james.newtonking.com/archive/2008/03/27/formatwith-string-format-extension-method.aspx
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