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1. • • (d+) - this will match one or more digits (0-9) and the brackets will mean they are captured in such a way as they could be used after the parsing.
     Reference:

     php - What does this regular expression mean? /^obj(\d+)\-{0 ...

2. Top results related to what does d+ mean in php language tutorial

   • 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

     Check all answers on Stack Overflow

     1/5

   • 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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     2/5

   • 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 Dec 28, 2010 · 1 votes

     Left Bitshift, http://php.net/manual/en/language.operators.bitwise.php

     Other Answers

     Answered Dec 28, 2010 · 1 votes

     << and >> are the so-called bitshift operator.

     x << n shifts the bits in the integer x n places to the left, effectively multiplying x with 2 to the power of n.

     Similarly x >> n shifts to the left, dividing x by 2 to the power of n.

     Check all answers on Stack Overflow

     3/5

   • 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 Dec 28, 2010 · 1 votes

     Left Bitshift, http://php.net/manual/en/language.operators.bitwise.php

     Other Answers

     Answered Dec 28, 2010 · 1 votes

     << and >> are the so-called bitshift operator.

     x << n shifts the bits in the integer x n places to the left, effectively multiplying x with 2 to the power of n.

     Similarly x >> n shifts to the left, dividing x by 2 to the power of n.

     Check all answers on Stack Overflow

     4/5

   • 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

     Check all answers on Stack Overflow

     5/5

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3. People also ask

   What is an expression in PHP?

   • Expressions are the most important building blocks of PHP. In PHP, almost anything you write is an expression. The simplest yet most accurate way to define an expression is "anything that has a value". The most basic forms of expressions are constants and variables.

   PHP: Expressions - Manual

   www.php.net/manual/en/language.expressions.php

   See all results for this question

   What are the different types of expressions in PHP?

   • PHP also supports two composite (non-scalar) types: arrays and objects. Each of these value types can be assigned into variables or returned from functions. PHP takes expressions much further, in the same way many other languages do. PHP is an expression-oriented language, in the sense that almost everything is an expression.

   PHP: Expressions - Manual

   www.php.net/manual/en/language.expressions.php

   See all results for this question

   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.

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

   stackoverflow.com/questions/6865673/what-does-the-syntax-s-and-d-mean-as-shorthand-for-calling-a-variable

   See all results for this question

   Is PHP an expression oriented language?

   • PHP is an expression-oriented language, in the sense that almost everything is an expression. Consider the example we've already dealt with, $a = 5. It's easy to see that there are two values involved here, the value of the integer constant 5, and the value of $a which is being updated to 5 as well.

   PHP: Expressions - Manual

   www.php.net/manual/en/language.expressions.php

   See all results for this question

4. stackoverflow.com › questions › 3178578php - What does this regular expression mean? /^obj(\d+)\-{0 ...

   stackoverflow.com › questions › 3178578

   • Cached

   Jul 9, 2011 · ^obj(\d+)-{0,1} means that the string is the start of a line and begins with obj, followed by a number of at least 1 digit, then there might be a -sign. (|mi\d{0,1}|critical|questionText|answerText-{0,1}\d+) means that the text is one of the following: nothing; mi which might be followed by a digit; critical; questionText

   Code sample

   critical

   |

   questionText

   |

   answerText...

   See more on stackoverflow

5. www.phptutorial.net › php-regular-expressionsPHP Regular Expressions - PHP Tutorial

   www.phptutorial.net › php-regular-expressions

   • Cached

   • Introduction to The Php Regular Expressions
   • Create Regular Expressions
   • Search Strings Using Regular Expressions
   • Replace Strings Using Regular Expressions
   • Summary

   PHP string functions allow you to test if a string contains a substring (str_contains()) or to replace all occurrences of a substring with another string (str_replace()). However, these functions deal with fixed patterns. They won’t work with flexible patterns. For example, if you want to search any numbers in a string, the str_contains()won’t work...

   See full list on phptutorial.net

   To create a regular expression, you place a pattern in forward-slashes like this: For example: The $patternis a string. Also, it is a regular expression that matches a number with one or more digits. For example, it matches the numbers 1, 20, 300, etc. Note that you’ll learn how to form flexible regular expressions in the following tutorial. The fo...

   See full list on phptutorial.net

   To search a string for a match to a pattern, you use the preg_match() and preg_match_all()functions.

   See full list on phptutorial.net

   To replace strings that match a regular expression, you use the preg_replace()function. For example: Output: In this example, the preg_replace() function replaces all numbers in the $message with the string %d.

   See full list on phptutorial.net

   PHP regular expressions are strings with pattern enclosing in delimiters for example "/pattern/".

   The preg_match()function searches for a match to a pattern in a string.

   The preg_match_all()function searches for all matches to a pattern in a string.

   The preg_replace()function searches a string for matches to a pattern and replaces them with a new string or pattern.

   See full list on phptutorial.net

6. www.php.net › manual › enPHP: Expressions - Manual

   www.php.net › manual › en

   • Cached

   PHP also supports two composite (non-scalar) types: arrays and objects. Each of these value types can be assigned into variables or returned from functions. PHP takes expressions much further, in the same way many other languages do. PHP is an expression-oriented language, in the sense that almost everything is an expression.

7. www.w3schools.com › phpPHP Tutorial - W3Schools

   www.w3schools.com › php

   • Cached

   PHP is a server scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft's ASP. Start learning PHP now ».

8. itecnotes.com › tecnote › php-what-does-d-mean-inPhp – What does \d+ mean in regular expression terms

   itecnotes.com › tecnote › php-what-does-d-mean-in

   • Cached

   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.

9. stackoverflow.com › questions › 6865673php - What does the syntax '%s' and '%d' mean as shorthand ...

   stackoverflow.com › questions › 6865673

   • Cached

   Viewed 33k times. Part of PHP Collective. 6. What do '%s' and '%d' mean in this example? It appears its shorthand for calling variables. Does this syntax only work within a class? // Class. class Building { // Object variables/properties. private $number_of_floors = 5; // These buildings have 5 floors. private $color; // Class constructor.

10. stackify.com › learn-php-tutorialsTop 25 PHP Tutorials: Resources to learn PHP- Stackify

    stackify.com › learn-php-tutorials

    • Cached

    Mar 19, 2024 · 1. PHP Manual. This is the official online manual for the PHP language. It is an immense source of PHP documentation as it covers everything from the basics to the implementation of security and other PHP functions. For ease of use, all functions from each released version are compiled in a list.