http://www.jquery4u.com/function-demos/ajax/
http://www.ajax-zoom.com/examples/example26.php
http://api.jquery.com/live/
w3schools.in
http://www.ajax-zoom.com/examples/example26.php
http://api.jquery.com/live/
w3schools.in
@ symbol is the error control operator
(aka the "silence" or "shut-up" operator). It makes PHP suppress any
error messages (notice, warning, fatal, etc) generated by the associated
expression. It works just like a unary operator, for example, it has a
precedence and associativity. Below are some examples:@echo 1 / 0;
// generates "Parse error: syntax error, unexpected T_ECHO" since
// echo is not an expression
echo @(1 / 0);
// suppressed "Warning: Division by zero"
@$i / 0;
// suppressed "Notice: Undefined variable: i"
// displayed "Warning: Division by zero"
@($i / 0);
// suppressed "Notice: Undefined variable: i"
// suppressed "Warning: Division by zero"
$c = @$_POST["a"] + @$_POST["b"];
// suppressed "Notice: Undefined index: a"
// suppressed "Notice: Undefined index: b"
$c = @foobar();
echo "Script was not terminated";
// suppressed "Fatal error: Call to undefined function foobar()"
// however, PHP did not "ignore" the error and terminated the
// script because the error was "fatal"
What exactly happens if you use a custom error handler instead of the standard PHP error handler:If you have set a custom error handler function with set_error_handler() then it will still get called, but this custom error handler can (and should) call error_reporting() which will return 0 when the call that triggered the error was preceded by an @.This is illustrated in the following code example:
function bad_error_handler($errno, $errstr, $errfile, $errline, $errcontext) {
echo "[bad_error_handler]: $errstr";
return true;
}
set_error_handler("bad_error_handler");
echo @(1 / 0);
// prints "[bad_error_handler]: Division by zero"
The error handler did not check if @ symbol was in effect. The manual suggests the following:function better_error_handler($errno, $errstr, $errfile, $errline, $errcontext) {
if(error_reporting() !== 0) {
echo "[better_error_handler]: $errstr";
}
// take appropriate action
return true;
}