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//transfer ASCII to string

$string = “78b101b116b87b105b110b100″;
$tags = explode(‘b’, $string); 
foreach($tags as $key) { echo chr($key);  }
//transfer string toASCII
echo “<br><br>”;
$string = “Tiger Young”;
foreach($tags as $key) { echo ord($key).”b”;  }
echo “<br><br>”;

I want to add some text at the footer of Zen Cart, how to do? In fact, it is very simple. Just modify some code as the following.

str_replace
(PHP 4, PHP 5)

str_replace — Replace all occurrences of the search string with the replacement string

$vowels = array(“a”, “e”, “i”, “o”, “u”, “A”, “E”, “I”, “O”, “U”);
$onlyconsonants = str_replace($vowels, “”, “Hello World of PHP”);

When you run wordpress under xamm,
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 334230 bytes) in D:\xampp\htdocs\test.php on line814.

 1. Open \xampp\apache\bin\php.ini .Do not go to the directory of phpt to find php5.ini .
2. Search”memory” and get the following:

;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;

max_execution_time = 60     ; Maximum execution time of each script, in seconds
max_input_time = 60    ; Maximum amount of time each script may spend parsing request data
memory_limit = 32M      ; Maximum amount of memory a script may consume (16MB)

3. Modify the value of “memory_limit =” ，usuall change it to 64M.

4. Reboot Apache.

trim
(PHP 4, PHP 5)

trim — Strip whitespace (or other characters) from the beginning and end of a string

get_ip_list below is a function that you must call in order to get something.

function get_ip_list() {
$tmp = array();
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && strpos($_SERVER['HTTP_X_FORWARDED_FOR'],’,')) {
$tmp += explode(‘,’,$_SERVER['HTTP_X_FORWARDED_FOR']);
} elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$tmp[] = $_SERVER['HTTP_X_FORWARDED_FOR'];
}
$tmp[] = $_SERVER['REMOTE_ADDR'];
return $tmp;
}
echo echo implode(“,”,get_ip_list());

The problem: we have an array of items in PHP and we want to find out if a specific item is in the array. In code we can define the array as:
Continue reading “Finding Items in an Array or not with PHP”

ucfirst — Make a string’s first character uppercase

example:

$coo= ‘clay desiccant!’;
$coo= ucfirst($desiccant); // Clay desiccant!

$bar = ‘CLAY DESICCANT!’;
$bar = ucfirst($bar); // CLAY DESICCANT!
$bar = ucfirst(strtolower($bar)); // Clay desiccant!

Continue reading “Make a string’s first character uppercase”

$dirname=”E:/zhanzhongjie/chengbiao-com/chengbiao-com”;
$dir_handle=opendir($dirname);
while($file=readdir($dir_handle)) Continue reading “How to show all files in a document?”

/*random function
$length: length of needed number
*/
function random($length) {
$hash = ”;
$chars = ‘0123456789′;
$max = strlen($chars) – 1;
mt_srand((double)microtime() * 1000000);
for($i = 0; $i < $length; $i++) {
$hash .= $chars[mt_rand(0, $max)];
} Continue reading “Php generate random numbers”