Answers for "exists php"

php check if file exists

if (!file_exists('http://mysite.com/images/thumbnail_1286954822.jpg')) {   
$filefound = '0';                         
}

if exist php

if (isset($var)) {
  // Code here
}

isset in php

/**
 * Returns a bool (true or false)
 */
isset($x);
/**
 * Examples
 */
$x = 'myValue';
if(isset($x)){
	echo 'x is set';
}
/**
 * this will echo out 'x is set'
 */


$x = null;
if(isset($x)){
	echo 'x is set';
}
/**
 * This will NOT echo out 'x is set'
 */


if(isset($y)){
 	echo 'y is set'; 
}
/**
 * This will NOT echo out 'y is set'
 */