Php If Not

Php if not equalAnswer 1:

Php If Not File Exists


Liquid water is not itself wet, but can make other solid materials wet.

Php

Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.

Whether an object is wet or dry depends on a balance between cohesive and adhesive forces. Cohesive forces are attractive forces within the liquid that cause the molecules in the liquid to prefer to stick together. Cohesive forces are also responsible for surface tension. If the cohesive forces are very strong, then the liquid molecules really like to stay close together and they won't spread out on the surface of an object very much. Install cmake mac os. On the contrary, adhesive forces are the attractive forces between the liquid and the surface of the material. If the adhesive forces are strong, then the liquid will try and spread out onto the surface as much as possible. So how wet a surface is depends on the balance between these two forces. If the adhesive forces (liquid-solid) are bigger than the cohesive forces (liquid-liquid), we say the material becomes wet, and the liquid tends to spread out to maximize contact with the surface. On the other hand, if the adhesive forces (liquid-solid) are smaller than the cohesive forces (liquid-liquid), we say the material is dry, and the liquid tends to bead-up into a spherical drop and tries to minimize the contact with the surface.

Php If Not Null

PHP If statement with NOT operator is used to execute if-block if the condition is false. NOT operator with condition inverts the result of condition. In this tutorial, we will go through the syntax of using NOT operator in If-statement and some examples to understand the usage. Syntax – PHP If with OR operator. KnightCite is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker for our site. Since we are using OR operator to combine the condition, PHP executes if-block if at least one of the condition1 and condition2 is true. If both the conditions are false, then PHP does not execute if-block statement (s). Example – PHP If with OR Operator In this example, we will write an if statement with compound condition. If You're Not Sure Where to Start. Academic Search Complete - Scholarly articles, magazines and newspapers. Gale eBooks - Online Subject Encyclopedias Credo Reference - Online Subject Encyclopedias JSTOR Collection - Scholarly Book and Articles. (PHP 4, PHP 5, PHP 7, PHP 8) The if construct is one of the most important features of many languages, PHP included. It allows for conditional execution of code fragments. PHP features an if structure that is similar to that of C.

Not

Water actually has pretty high cohesive forces due to hydrogen bonding, and so is not as good at wetting surfaces as some liquids such as acetone or alcohols. However, water does wet certain surfaces like glass for example. Adding detergents can make water better at wetting by lowering the cohesive forces . Water resistant materials such as Gore-tex fabric is made of material that is hydrophobic (water repellent) and so the cohesive forces within the water (liquid-liquid) are much stronger than the adhesive force (liquid-solid) and water tends to bead-up on the outside of the material and you stay dry.

Php If Not Set

I need help. These if statements don't work like they should.. [PHP]
/*Array Info that is being pulled from the room table:
0 = ID
1 = Title
2 = Description
3 = North
4 = South
5 = East
6 = West
7 = Up
8 = Down
9 = X coord
10 = Y coord
11 = Z coord
*/
if ($dir 1 AND $ray[3] 1) {
++$_SESSION['xcoord'];
echo '<META HTTP-EQUIV='refresh'>';
} else {
echo '<META HTTP-EQUIV='refresh'>';
}
if ($dir 2 AND $ray[5] 1) {
++$_SESSION['ycoord'];
echo '<META HTTP-EQUIV='refresh'>';
} else {
echo '<META HTTP-EQUIV='refresh'>';
}
if ($dir 3 AND $ray[4] 1) {
--$_SESSION['xcoord'];
echo '<META HTTP-EQUIV='refresh'>';
} else {
echo '<META HTTP-EQUIV='refresh'>';
}
if ($dir 4 AND $ray[6] 1) {
--$_SESSION['ycoord'];
echo '<META HTTP-EQUIV='refresh'>';
} else {
echo '<META HTTP-EQUIV='refresh'>';
}
if ($dir 5 AND $ray[7] 1) {
++$_SESSION['zcoord'];
echo '<META HTTP-EQUIV='refresh'>';
} else {
echo '<META HTTP-EQUIV='refresh'>';
}
if ($dir 6 AND $ray[8] 1) {
--$_SESSION['zcoord'];
echo '<META HTTP-EQUIV='refresh'>';
} else {
echo '<META HTTP-EQUIV='refresh'>';
}[/PHP] Am I doing too much coding or would it be something in the array?
$dir = Move command
$ray[number] = 1 or 0 with 1 being TRUE and 0 being FALSE
$_SESSION['x/y/zcoord'] = Coordinate Plane