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Herb Tucker

PHP: Expressions - Manual - 0 views

www.php.net/...language.expressions.php

php manual expressions

shared by Herb Tucker on 01 Feb 11 - Cached
  • (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"
  • ...16 more annotations...
  • 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.
  • Herb Tucker on 01 Feb 11
     
    Expressions defined and discussed with highlighting
awqi zar

Swagger: A simple, open standard for describing REST APIs with JSON - 0 views

swagger.wordnik.com

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shared by awqi zar on 31 Aug 11 - No Cached
  • Template Range on 04 Sep 11
     
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Rem PC

The Best Remote PC Support I Ever Had - 1 views

The Remote PC Support Now excellent remote PC support services are the best. They have skilled computer tech professionals who can fix your PC while you wait or just go back to work or just simply...

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started by Rem PC on 12 Sep 11 no follow-up yet
raceitsolutions

Website Designers in Hyderabad - 0 views

Welcome to Race IT Solutions we started out with the idea that we will be providing affordable Web Design Services as a Web Design Company to the business community in Hyderabad and rest of India. ...

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raceitsolutions

Website Promotion - 0 views

Welcome to Race IT Solutions we started out with the idea that we will be providing affordable Web Design Services as a Web Design Company to the business community in Hyderabad and rest of India. ...

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Spectruss Webdesign

The Need of Photography Chattanooga For Marketing - Spectruss - 1 views

spectrussblog.wordpress.com/...aphy-chattanooga-for-marketing

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shared by Spectruss Webdesign on 15 Dec 15 - No Cached
  • Spectruss Webdesign on 15 Dec 15
     
    Photography for marketing solutions have always proved to be utmost successful for many business in the global market. Dedicated photography and video services offered by Spectruss are one of the services incorporated amongst the rest of the marketing services provided.
Poonam Soni

Python App Development Framework- Top 10 Python Applications - 0 views

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shared by Poonam Soni on 30 Dec 22 - No Cached
  • Poonam Soni on 30 Dec 22
     
    List out top 10 best frameworks of Python app development software to develop web and mobile applications, Android apps, digital advertisement, online gambling, automobile, data & analytics and for many more software prototypes. OnGraph offers smart solutions with Python application development frameworks like Django, Flask, TurboGears, Kivy, and Tornado. Get in touch to hire cheap python developers with us.
Poonam Soni

Laravel Web App Development Services - 0 views

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shared by Poonam Soni on 22 Nov 22 - No Cached
  • Poonam Soni on 22 Nov 22
     
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wecodefuture2015

Use of FOMO Plugin - 2 views

With this tool, you can easily create high-converting landing pages in minutes. Say goodbye to the hassle of designing landing pages from scratch. With our new plugin, all you need to do is input y...

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started by wecodefuture2015 on 11 Oct 22 no follow-up yet
wecodefuture2015

Benefits of FOMO Plugin. - 3 views

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Poonam Soni

Angular consultant | Angular js web development company - 0 views

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shared by Poonam Soni on 06 Dec 21 - No Cached
  • Poonam Soni on 06 Dec 21
     
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