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- They are format specifiers, meaning a variable of a specified type will be inserted into the output at that position. This syntax works outside of classes as well. From the documentation: d - the argument is treated as an integer, and presented as a (signed) decimal number. s - the argument is treated as and presented as a string.
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- What does "=>" mean in PHP?
 Top Answer
 Answered Jan 20, 2015 · 135 votes
 => is the separator for associative arrays. In the context of that foreach loop, it assigns the key of the array to $user and the value to $pass.
 Example:
 $user_list = array( 'dave' => 'apassword', 'steve' => 'secr3t');foreach ($user_list as $user => $pass) { echo "{$user}'s pass is: {$pass}\n";}// Prints: // "dave's pass is: apassword"// "steve's pass is: secr3t"
 
 Note that this can be used for numerically indexed arrays too.
 Example:
 $foo = array('car', 'truck', 'van', 'bike', 'rickshaw');foreach ($foo as $i => $type) { echo "{$i}: {$type}\n";}// prints:// 0: car// 1: truck// 2: van// 3: bike// 4: rickshaw
 
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 1/5
- What does @ mean in PHP?
 Top Answer
 Answered Apr 19, 2011 · 72 votes
 The @
 
 operator tells PHP to suppress error messages, so that they will not be shown.
 For instance, using:
 $result = mysql_query("this is an invalid query");-
 
 would result in a warning being shown, telling you that the MySQL query is invalid, while
 $result = @mysql_query("this is still an invalid query");-
 
 would not.
 Note, however, that this is very bad programming practice as it does not make error disappear, it just hides them, and it makes debugging a heck of a lot worse since you can't see what's actually wrong with your code.
 Instead of using @, you should disable error_reporting
 
 and display_errors
 
 just display_errors in php.ini
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 2/5
- What does ":" mean in PHP?
 Top Answer
 Answered Jan 20, 2011 · 40 votes
 It's called an Alternative Syntax For Control Structures. You should have an endwhile; somewhere after that. Basically, it allows you to omit braces {} from a while to make it look "prettier"...
 As far as your edit, it's called the Ternary Operator (it's the third section). Basically it's an assignment shorthand.
 $foo = $first ? $second : $third;
 
 is the same as saying (Just shorter):
 if ($first) { $foo = $second;} else { $foo = $third;}
 
 Other Answers
 Answered Aug 25, 2011 · 14 votes
 There is an example listed in the documentation for while
 
 that explains the syntax:
 Like with the if statement, you can group multiple statements within the same while loop by surrounding a group of statements with curly braces, or by using the alternate syntax:
 while (expr): statement ...endwhile;
 
 An answer over here explains it like this:
 This (:) operator mostly used in embedded coding of php and html.
 Using this operator you can avoid use of curly brace. This operator reduce complexity in embedded coding. You can use this(:) operator with if, while, for, foreach and more...
 Without (:) operator
 <body><?php if(true){ ?>This is just test<?php } ?></body>
 
 With (:) operator
 <body><?php if(true): ?>This is just test<?php endif; ?></body>
 
 Other Answers
 Answered Jan 20, 2011 · 8 votes
 it's like:
 <?phpwhile(have_posts()) { the_post();}?>
 
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 3/5
- What does :: mean in php?
 Top Answer
 Answered Aug 05, 2011 · 21 votes
 It's the 'Scope Resolution Operator'.
 The Scope Resolution Operator (also called Paamayim Nekudotayim) or in simpler terms, the double colon, is a token that allows access to static, constant, and overridden properties or methods of a class.
 http://php.net/manual/en/language.oop5.paamayim-nekudotayim.php
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 4/5
- What does "<<" mean in PHP?
 Top Answer
 Answered Dec 28, 2010 · 4 votes
 this is the shift left operator.
 so in your example you are shifting left the value 1 , $count_log2 times to the left. so the value is 2^count_log2.
 1 in 8 bit binary is 00000001 so if $count_log2 = 4, we need to get 2^4 = 16.
 shifting left means moving the 1 left 4 times (since $count_log2 = 4). lets do the steps.
 00000010 (2 in decimal)
 00000100 (4 in decimal)
 00001000 (8 in decimal)
 00010000 (16 in decimal)
 so we got 2^4.
 a common reason for using shift operation is that it takes less time for the processor to do a shift operation than using multiplication.
 Other Answers
 Answered Aug 25, 2011 · 14 votes
 There is an example listed in the documentation for while
 
 that explains the syntax:
 Like with the if statement, you can group multiple statements within the same while loop by surrounding a group of statements with curly braces, or by using the alternate syntax:
 while (expr): statement ...endwhile;
 
 An answer over here explains it like this:
 This (:) operator mostly used in embedded coding of php and html.
 Using this operator you can avoid use of curly brace. This operator reduce complexity in embedded coding. You can use this(:) operator with if, while, for, foreach and more...
 Without (:) operator
 <body><?php if(true){ ?>This is just test<?php } ?></body>
 
 With (:) operator
 <body><?php if(true): ?>This is just test<?php endif; ?></body>
 
 Other Answers
 Answered Jan 20, 2011 · 8 votes
 it's like:
 <?phpwhile(have_posts()) { the_post();}?>
 
 Check all answers on Stack Overflow
 5/5
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What does %D & %S mean in a function call?
Those are placeholders for the variables that follow. %d means treat it as a number. %s means treat it as a string. The list of variables that follow in the function call are used in the order they show up in the preceding string. printf is a "classic" function that have been around for a while and are implemented in many programming languages.

php - What does the syntax '%s' and '%d' mean as shorthand for calling

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They are format specifiers, meaning a variable of a specified type will be inserted into the output at that position. This syntax works outside of classes as well. From the documentation: d - the argument is treated as an integer, and presented as a (signed) decimal number.
- That's part of the printf method. Those are placeholders for the variables that follow. %d means treat it as a number. %s means treat it as a st...
- %s means format as "string" and is replaced by the value in $this->number_of_floors %d means format as "integer", and is being replaced by the va...
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itecnotes.com › tecnote › php-what-does-d-mean-inPhp – What does \d+ mean in regular expression terms

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So, \d+ is 1 or more digits. This is about as simple as regular expressions get. You should try reading up on regular expressions a little bit more. Google has a lot of results for regular expression tutorial, for instance.
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PHP (recursive acronym for PHP: Hypertext. Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML. Nice, but what does that mean?
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Mar 1, 2024 · PHP is a server-side scripting language, which means that a server executes the instructions in a script. Then, the server provides data on request, channels the requests, and organizes the information in a database. When a web server receives a script, it will process the request and send output to a web browser in an HTML format.
www.php.net › manual › enPHP: Type - Manual

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Type Operators. ¶. instanceof is used to determine whether a PHP variable is an instantiated object of a certain class : Example #1 Using instanceof with classes. <?php. class MyClass. {. } class NotMyClass.

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php - What does the syntax '%s' and '%d' mean as shorthand for calling

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