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PHP Vocab

PHP Vocab

memorize.aimemorize.ai (lvl 286)
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28 cards
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Section 1

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string (data type)

Front

1 / 28

PHP
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Last updated

6 years ago

Date created

Mar 14, 2020

Cards (28)

Section 1

(28 cards)

string (data type)

Front

A sequence of characters, like "Hello world!". It can be any text inside quotes. You can use single or double quotes.

Back

global keyword

Front

used to access a global variable from within a function

Back

array (data type)

Front

stores multiple values in one single variable

Back

variables

Front

containers for storing information

Back

PHP

Front

"PHP: Hypertext Preprocessor," named recursively, is the most common server-side scripting language, allowing a web server to produce a web page "on the fly" based on data provided by the client.

Back

$GLOBALS[index]

Front

PHP also stores all global variables in an array called ______. The index holds the name of the variable. This array is also accessible from within functions and can be used to update global variables directly.

Back

rules for variables

Front

- A variable starts with the $ sign, followed by the name of the variable - A variable name must start with a letter or the underscore character - A variable name cannot start with a number - A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ) Variable names are case-sensitive ($age and $AGE are two different variables)

Back

a variable starts with

Front

$ followed by the name of the name of the variable e.g. <?php$txt = "Hello world!"; $x = 5; $y = 10.5;?>

Back

<?php

Front

a PHP script starts with

Back

local global static

Front

PHP has three different variable scopes:

Back

boolean (data type)

Front

represents a single value of either TRUE or FALSE

Back

float

Front

(floating point number) is a number with a decimal point or a number in exponential form.

Back

.php

Front

the default extension for PHP files is

Back

local scope

Front

A variable declared within a function has a _____ and can only be accessed within that function:

Back

echo and print

Front

the two basic ways to get output in PHP

Back

;

Front

PHP statements end with a

Back

finished up through PHP data types

Front

finished up through PHP data types

Back

print

Front

PHP for "put the following text (or other input) on the screen". has a return value of 1, so it can be used in expressions. an only take one argument. marginally slower than the other basic way to get output.

Back

anywhere

Front

where can a php script be placed in the document?

Back

echo

Front

PHP for "put the following text (or other input) on the screen". has no return value. can take multiple parameters (although such usage is rare). marginally faster than the other basic way to get output.

Back

var_dump() function

Front

this function returns the data type and value

Back

no

Front

In PHP, are keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-defined functions are case-sensitive?

Back

object (data type)

Front

a data type which stores data and information on how to process that data. In PHP, an _____ must be explicitly declared.

Back

yes

Front

are variable names case-sensitive in PHP?

Back

integer (data type)

Front

a non-decimal number between -2,147,483,648 and 2,147,483,647

Back

?>

Front

a PHP script ends with

Back

null

Front

a special data type which can have only one value: ____. A variable of data type ____ is a variable that has no value assigned to it. Tip: If a variable is created without a value, it is automatically assigned a value of ____. Variables can also be emptied by setting the value to ____.

Back

global scope

Front

A variable declared outside a function has a ____________ and can only be accessed outside a function:

Back