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Herb Tucker

PHP: Expressions - Manual - 0 views

  • (scalar values are values that you can't 'break' into smaller pieces, unlike arrays, for instance
  • Expressions are the most important building stones 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"
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  • 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 is an expression-oriented language
  • Since assignments are parsed in a right to left order, you can also write '$b = $a = 5'
  • and that's the value of the assignment itself
  • A very common type of expressions are comparison expressions. These expressions evaluate to either FALSE or TRUE. PHP supports > (bigger than), >= (bigger than or equal to), == (equal), != (not equal), < (smaller than) and <= (smaller than or equal to). The language also supports a set of strict equivalence operators: === (equal to and same type) and !== (not equal to or not same type). These expressions are most commonly used inside conditional execution, such as if statements.
  • and is assigned back into $a,
  • The last example of expressions we'll deal with here is combined operator-assignment expressions
  • Adding 3 to the current value of $a can be written '$a += 3'
  • This means exactly "take the value of $a, add 3 to it, and assign it back into $a"
  • Any two-place operator can be used in this operator-assignment mode, for example '$a -= 5' (subtract 5 from the value of $a), '$b *= 7' (multiply the value of $b by 7), etc.
  • There is one more expression that may seem odd if you haven't seen it in other languages, the ternary conditional operator:
  • If the value of the first subexpression is TRUE (non-zero), then the second subexpression is evaluated, and that is the result of the conditional expression. Otherwise, the third subexpression is evaluated, and that is the value
  • Some expressions can be considered as statements. In this case, a statement has the form of 'expr ;' that is, an expression followed by a semicolon. In '$b = $a = 5;', '$a = 5' is a valid expression, but it's not a statement by itself. '$b = $a = 5;' however is a valid statement.
  • One last thing worth mentioning is the truth value of expressions. In many events, mainly in conditional execution and loops, you're not interested in the specific value of the expression, but only care about whether it means TRUE or FALSE. The constants TRUE and FALSE (case-insensitive) are the two possible boolean values.
  • Throughout the rest of this manual we'll write expr to indicate any valid PHP expression.
  • Functions are expressions with the value of their return value.
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    Expressions defined and discussed with highlighting
mydocenthelp

Online Homework Help, Tutoring Platform, Assignment Assistance- MyDocent - 0 views

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    MyDocent, an online tutoring website offering best-in-class tutoring services to students globally. Our expert and experienced tutors are available 24x7 for students to help them clear their doubts and concepts. Our educators teach all subjects and standards and we provide online homework help and assignment assistance to students at economical prices. Just upload your query and get instant answers or assistance and secure better grades in your academics. www.mydocent.com
Herb Tucker

Linux Knowledge Base and Tutorial - 0 views

  • The UMASK value masks out the bits. The permissions that each position in the UMASK masks out are the same as the file permissions themselves. So, the left-most position masks out the owner permission, the middle position the group, and the right most masks out all others. If we have UMASK=007, the permissions for owner and group are not touched. However, for others, we have the value 7, which is obtained by setting all bits. Because this is a mask, all bits are unset. (The way I remember this is that the bits are inverted. Where it is set in the UMASK, it will be unset in the permissions, and vice versa.)
  • The problem many people have is that the umask command does not force permissions, but rather limits them
  • Therefore, setting the UMASK=007 does not force creation of executable programs, unless the program creating the file does itself).
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  • - - regular file c - character device b - block device d - directory p - named pipe l - symbolic link
  • Lets look at a more complicated example. Assume we have UMASK=047. If our program creates a file with permissions 777, then our UMASK does nothing to the first digit, but masks out the 4 from the second digit, giving us 3. Then, because the last digit of the UMASK is 7, this masks out everything, so the permissions here are 0. As a result, the permissions for the file are 730. However, if the program creates the file with permissions 666, the resulting permissions are 620. The easy way to figure out the effects of the UMASK are to subtract the UMASK from the default permissions that the program sets. (Note that all negative values become 0.)
  • You can change it anytime using the umask command. The syntax is simply umask <new_umask>
  • Here the <new_umask> can either be the numeric value (e.g., 007) or symbolic. For example, to set the umask to 047 using the symbolic notation, we have umask u=,g=r,o=rwx
  • Where "new_owner" is the name of the user account we want to sent the owner of the file to, and "filename" is the file we want to change. In addition, you can use chown to change not only the owner, but the group of the file as well. This has the general syntax: chown new_owner.new:group filename
  • Another useful trick is the ability to set the owner and group to the same ones as another file. This is done with the --reference= option, which sets to the name of the file you are referencing. If you want to change just the group, you can use the chgrp command, which has the same basic syntax as chown. Not that both chgrp and chmod can also take the --reference= option. Further, all three of these commands take the -R option, which recursively changes the permissions, owner or group.
vaishnaviwri

Best Outsourcing Service for Magento, Hire Dedicated Magento Developer, Magento Develop... - 0 views

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Redesign Unit

Tips For Selecting a Best Web Redesign Company - 0 views

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    SEO Friendly Designer: Before assigning project to any Web Redesign Company.
Manish Rawat

12 Job Boards for Designers where Quality is Praised Above all - 0 views

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    We designers- the community of creativity, how often have thought about a forum or marketplace where quality of work is placed on top, where people do not compare the bids, but take credibility as a measure of comparison to assign the projects.
Jason Smith

Working with Freelance IT Interviewers to Find Top Tech Talent | eTeki - 0 views

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    Finding the right candidates for your organization's open assignments can be a challenge at times, especially in a candidate-driven job market. Tech-savvy talent can be hard to come by sometimes, especially if your company is looking for a specific set of skills or needs to hire
vaishnaviwri

https://assignable.io/category/wordpress-development-service - 1 views

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    We are a digital company having expertise in WordPress, Joomla, Magento and logo designing.
Sofia Martin

Connect with D-link Support to assign a static IP address to adapter - 1 views

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    Do you know how to assign a static IP address to the adapter? If you don't know, then read this Presentation and try to do yourself. If you are unable to do then dial our toll-free Dlink support number 1800954282 and get instant support from our experts. For more info visit our website. https://dlink.routersupportaustralia.com.au/
Sofia Martin

Connect with D-link Support to assign a static IP address to adapter - 1 views

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geoflypages121

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    Lorem ipsum dolor sit amet text is nothing it's only dummy text. It is a grouping of words without a feeling of Latin inference that makes up a content otherwise called filler content, imaginary, visually impaired or placeholder. Lorem Ipsum content is utilized to fill spaces assigned to have writings that have not yet been distributed. They use developers, visual creators, typographers to get a genuine impression of the advanced/publicizing/publication item they are taking a shot at. Its origins date back to 45 BC. In fact, his words were randomly extracted from the De finibus bonorum et malorum , a classic of Latin literature written by Cicero over 2000 years ago.
Ahxn Amc

Most Engaging Tools Of Medical Website Marketing - 0 views

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    Medical website marketing is the demand of the time for all the healthcare clinics who are functioning their websites and who need to expand their patient's capacity. Optimzed360 is the marketer for you as they have the competent squad dealing with medical website marketing with a complete center of attention on specific assignment basis.
magecompinc

How to assign guest customers orders into registered account in Magento 2 - 0 views

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    When any Customer places an order from your Magento 2 Store as Guest Customer and later on that customer registers themselves in store, then you can display their orders they placed as guest customers by adding custom code in your custom Extension.
iamkajal

Using Pointers in C | Studytonight - 0 views

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    A pointer is a variable used to store memory address. Hence, we have to declare and initialise(assign it a value) it just like any other variable.
Jitendra Patel

Seo Traffic Engine - Seo Onpage and Offpage Services - 0 views

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    Microformats are easy conventions (known as entities) used on web content to explain a particular sort of data. Microformats use the category attribute in hypertext markup language tags (often or ) to assign temporary and descriptive names to entities and their properties and vcard, hcard, span class tag to define CreativeWork, Organization, Event, music, Person, Place and Product.
Magento

Magento Mega menu :Change the way Top navigation displays. Allow administrator to easil... - 0 views

shared by Magento on 18 Feb 13 - No Cached
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    Magento Mega Menu Features: Display categories and corresponding sub-categories in different columns which are classified clearly. Easily select Main category of menu's item on a user-friendly interface Able to restrict sub-categories and level of category on one menu. Allow and disallow which category to display within the dropdown menu Able to add thumbnail image of each category to the dropdown menu Able to display whatever content format within the dropdown menu, such as video, flash, html… Attached Editor makes it possible to process content with a peace of mind using available tools Allow to insert whatever widgets (similar to widget insertion of a CMS page) Broaden the option to add widget to select any products to insert into the dropdown menu Support dynamic URL usage in the Editor Allow to insert images into the dropdown menu Able to add, delete, edit, re-arrange the menu's order without any difficulties Easy to manage and customize the dropdown menu Possible to add static content to display in line with the list of sub-menus (changeable position: above, below, left, right in accordance with the sub-menus) Manage the navigation of the menu flexibly Able to assign menu's item to different stores Able to select time duration to display the menu's item Able to add class to the menu's item (supports developer to edit style of the menu) Plenty available themes to select (7 themes available, more updates to come)
alijutt1122

Responsive Website using DREAMWEAVER - 0 views

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    Hy everyone If you want a Professional Website for your business to promote in the market...and provide your all servies to the customers in just one click. Special discount for student's Assignments of school n universities as well. SO your worries is overcome just ask me. I can develop according to your demands. I will make sure you really appreciate my work and also hire me in future
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Arthur Cane

Expert Web Developer - 1 views

I was looking for a web development company and I found Syntactics in my search list. Thanks to the expert team from the company for an excellent job. Since it is my first website project, I do not...

web development

started by Arthur Cane on 03 Feb 12 no follow-up yet
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