PHP Tutorial #12 String Methods ( Bin2Hex, Count_Chars, Explode and Hex2Bin ) by alexendre-maxim

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utopian-io · @alexendre-maxim · Dec 23 '18

$18.16

PHP Tutorial #12 String Methods ( Bin2Hex, Count_Chars, Explode and Hex2Bin )

<html>
<p><img src="https://cdn.steemitimages.com/DQmR2CdPgUAaypJwbE8QhahqDxrabLTM5fHq8ZjTPcVr2fg/bbva-open4u-herramientas-basicas-desarrolladores-php_1.jpg" width="2122" height="1415"/></p>
<p><a href="https://cdn.steemitimages.com/DQmR2CdPgUAaypJwbE8QhahqDxrabLTM5fHq8ZjTPcVr2fg/bbva-open4u-herramientas-basicas-desarrolladores-php_1.jpg">Image Source</a></p>
<h2>Repository</h2>
<p><a href="https://github.com/php/php-src">https://github.com/php/php-src</a> &nbsp;</p>
<h2>What Will I Learn?</h2>
<p>I will learn the string methods the second part we will take the " Bin2Hex, Count_Chars, Explode and Hex2Bin " methods</p>
<ul>
  <li>How to convert from Binary to Hexadecimal using the Bin2Hex method.</li>
  <li>What's the Count_Chars method and how to use it .</li>
  <li>How to divide the string using the Explode method.</li>
  <li>How to convert from Hexadecimal to Binary using the Hex2Bin method.</li>
</ul>
<h2>Requirements</h2>
<ul>
  <li>Server support PHP , Xampp or Wamp for example</li>
  <li>An IDE like Sublime text.</li>
  <li>Browser (Chrome for example)&nbsp;</li>
</ul>
<h2>Difficulty</h2>
<ul>
  <li>Basic</li>
</ul>
<h2>Description</h2>
<h3>1 – Bin2Hex Method</h3>
<p>The bin2hex function converts the binary representation data to hexadecimal representation. The bin2hex function returns a text string encoding ASCII that contains hexadecimal representation of the string parameter.&nbsp;</p>
<p>It has " The String " as parameter and it returns the hexadecimal representation of the entered text string.&nbsp;</p>
<p>To use the Bin2Hex method you need to pass the string as parameter</p>
<p><code>bin2hex($string)</code></p>
<p>In this example I will convert a string " PHP is the best ! " to the Hexadecimal representation using " Bin2Hex " method</p>
<p><code>$str = "PHP is the best !"; &nbsp;&nbsp;&nbsp;</code></p>
<p><code>$b2x = bin2hex($str); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code></p>
<p><code>echo "PHP is the best ! in HEX : " . $b2x;&nbsp;</code></p>
<p>I created a variable " b2x " to contain the returning value from the method and I passed the string as parameter , this is the result</p>
<p><img src="https://cdn.steemitimages.com/DQmcNrytYRVNBmcDybCVFcE6NqY2jQ7U2u4LXneaQhfrY7E/capture-20181223-231442.png" width="876" height="207"/></p>
<h3>2 – Count_Chars Method</h3>
<p>The count_chars function returns information about the characters in the text string. The function returns the number of iterations for each byte-value from the value 0 to 255 in a text string in different ways.</p>
<p>It has the string as parameter and it returns 4 results depending on the number that you give as parameter.&nbsp;</p>
<p>To use the count_chars method you must pass the string and the num as parameters</p>
<p><code>count_chars($string, num)</code></p>
<p>The method returns 4 results depending to the num passed as parameter , for example if the " num " equals to 1 it will return an array with ASCII code of values exist in the string passed as parameter, also if the " num " equals to 3 it will return a string with all the letters used in the string .</p>
<p><img src="https://cdn.steemitimages.com/DQmRjg6ygh2doDFzqxNQVFwMm9gENP117yarM83PZWe3CWE/capture-20181223-232005.png" width="402" height="429"/></p>
<p><img src="https://cdn.steemitimages.com/DQmeo1agBCYQXuSEqnymC6n2qWcS5f38fxtmY7ezTLpezcM/capture-20181223-232023.png" width="1348" height="273"/></p>
<h3>3 – Explode Method</h3>
<p>The explode function divides a text string into sections and returns it as an array. The explode function returns an array of text strings. Each text string is a segmentation of the total text string by dividing it at the delimiter string.&nbsp;</p>
<p>It has 3 parameters :&nbsp;</p>
<ul>
  <li>The first is the delimiter : The string selector, which is the type in which the text string will be divided.&nbsp;</li>
  <li>The second is string The entered text string to segment.&nbsp;</li>
  <li>The third parameter is limit : If the parameter value is positive, the returned array will contain elements with a limit number, with the last element in the array containing the rest of the text string. If the parameter value is negative, the returned array will contain all text string characters except another -limit element. &nbsp;</li>
</ul>
<p>To use the explode method you pass the delimiter and the string as parameters</p>
<p><code>explode(delimiter,$string)</code></p>
<p>I will use the same string " PHP is the best ! " as parameter to the explode method , it will return an indexed array starts from 0 to the number of the last element.</p>
<p><code>&nbsp;print_r(explode(" ", $str));&nbsp;</code></p>
<p>The delimiter is the space , the explode method will cut the element before the space and add it to the array , finally it will return the indexed array</p>
<p><img src="https://cdn.steemitimages.com/DQmX6z1cc7Y8DmX2jtSQFU3QQ5pnwNejHw3gV3RRbqTSh33/capture-20181223-232620.png" width="473" height="297"/></p>
<h3>4 – Hex2Bin Method&nbsp;</h3>
<p>The hex2bin function decodes the hexadecimal encoding of the binary representation strings. The hex2bin function does not convert the hexadecimal representation of numbers to binary representation, but uses the base_convert () function to perform such a transformation.&nbsp;</p>
<p>It has " the data " as parameter and it returns the binary representation of the entered data, or the FALSE value in case of failure.</p>
<p>The hex2bin function causes the error E_WARNING if the length of the text string is odd or has a hexadecimal representation. &nbsp;</p>
<p>To use the Hex2Bin method you must pass the string as parameter</p>
<p><code>hex2bin($string)</code></p>
<p>I will use the " b2x " variable that I have created in the previous example to convert it from the hexadecimal representation to the binary</p>
<p><code>echo hex2bin($b2x);&nbsp;</code></p>
<p>The function will return a binary data from the hexadecimal representation and this is the result</p>
<p><img src="https://cdn.steemitimages.com/DQmZyDvPgz6NxhREyoEd6PvLh7XUW2bYmBL22KrsgCpy5he/capture-20181223-233238.png" width="385" height="103"/></p>
<h2>Video Tutorial&nbsp;</h2>
<p>&nbsp;https://www.youtube.com/watch?v=iJtyRloB-wk&amp;feature=youtu.be</p>
<h2>Curriculum</h2>
<ul>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-01-indexed-arrays-associative-arrays-and-multidimensional-arrays">PHP Tutorial #01 Indexed Arrays, Associative Arrays and Multidimensional Arrays</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-02-array-methods-sort-rsort-ksort-krsort-arrayreverse-and-shuffle">PHP Tutorial #02 Array Methods (Sort, Rsort, Ksort, Krsort , Array_Reverse And Shuffle)</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/5jhula-php-tutorial-03-array-methods-search-methods-addition-methods-and-the-remove-methods">PHP Tutorial #03 Array Methods ( Search Methods , Addition Methods and the Remove Methods)</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-04-array-methods-arraysum-arrayrand-arraycolumn-and-arrayunique">PHP Tutorial #04 Array Methods (Array_Sum, Array_Rand, Array_Column and Array_Unique)</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-05-array-methods-arraychunk-arraycombine-arraycountvalues-and-arrayproduct">PHP Tutorial #05 Array Methods (Array_Chunk, Array_Combine, Array_Count_Values and Array_Product)</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-06-array-methods-arrayfillkeys-arrayfill-arrayflip-and-arrayfilter">PHP Tutorial #06 &nbsp;Array Methods (Array_Fill_Keys,Array_Fill, Array_Flip and Array_Filter)</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-07-array-methods-arraykeys-arraymap-arraymerge-and-arraypad">PHP Tutorial #07 Array Methods ( Array_Keys, Array_Map, Array_Merge and Array_Pad )</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-08-array-methods-arrayreplace-arrayvalues-arrayslice-and-arrayintersect">PHP Tutorial #08 Array Methods ( Array_Replace, Array_Values, Array_Slice and Array_Intersect )</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-09-array-methods-arraywalk-current-next-prev-end-and-reset">PHP Tutorial #09 Array Methods (Array_Walk, Current, Next, Prev, End and Reset )</a></li>
  <li><a href="https://steemit.com/utopian-io/@alexendre-maxim/php-tutorial-10-array-methods-arraydiffkey-arraydiff-arrayintersectkey-and-arraychangekeycase">PHP Tutorial #10 Array Methods (Array_Diff_Key, Array_Diff, Array_Intersect_Key and Array_Change_Key_Case )</a></li>
</ul>
<h2>Proof of Work Done&nbsp;</h2>
<p>https://github.com/alexendre-maxim/PHP-Tutorial/blob/master/str2.php</p>
</html>

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vote details (108)

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matildapurse	2,186,994,903	25%
elviento	537,632,292	0.71%
miniature-tiger	133,816,257,709	50%
jga	1,480,921,544	12.06%
tensor	27,204,612,444	100%
codingdefined	15,873,604,572	15%
bachuslib	21,044,584,901	100%
accelerator	17,882,563,606	1.29%
piaristmonk	19,088,767,482	100%
mcfarhat	13,129,409,634	8.69%
utopian-io	30,611,016,450,350	24.13%
jaff8	41,424,744,477	21.73%
steemtaker	2,234,649,983	2%
scipio	239,557,845,989	100%
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asaj	17,705,277,393	100%
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@rosatravels · Dec 24 '18

$12.69

Hi @alexendre-maxim

Thank you for your contribution to the video tutorial.

I am very pleased with the improvement you have made in the tutorial.  The presentation is getting better and also you have made the 'fonts' to good sizes for learners to follow easily.

I also see you varying your tones in your lecturing speech. This is important because learners can pick up the emphasis and follow your lessons easier.

I am sure as you continue on to develop better outlines and structures,  your tutorials will continually improve.

I can see that you have taken the suggestions given to you.  Thank you for implementing them.

You will be happy to see the higher score this time.  Merry Christmas.

Have a happy holiday!

Rosa

Your contribution has been evaluated according to [Utopian policies and guidelines](https://join.utopian.io/guidelines), as well as a predefined set of questions pertaining to the category.

To view those questions and the relevant answers related to your post, [click here](https://review.utopian.io/result/9/1-2-2-3-2-2-2-2-3-).

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👍 utopian-io, mightypanda, amosbastian, hakancelik, alexendre-maxim, statsexpert, organicgardener, reazuliqbal, icurate, fastandcurious, monster-inc, linknotfound, pixresteemer, sttest2, sttest1

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properties (23)vote details (15)

voter	rshares	pct
pixresteemer	1,425,614,299	7%
utopian-io	22,367,506,839,161	15.84%
amosbastian	46,865,525,169	18.76%
organicgardener	7,739,597,643	25%
sttest1	0	12.14%
sttest2	0	12.14%
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hakancelik	30,648,897,017	40%
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@alexendre-maxim · Dec 28 '18

@rosatravels Thank you very much and I am really happy that I provide content that helps the users and followers to understand this language.

properties (22)

@utopian-io · Dec 26 '18

Thank you for your review, @rosatravels! Keep up the good work!

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@steem-ua · Dec 24 '18

#### Hi @alexendre-maxim!

Your post was upvoted by @steem-ua, new Steem dApp, using UserAuthority for algorithmic post curation!
Your post is eligible for our upvote, thanks to our collaboration with @utopian-io!
**Feel free to join our [@steem-ua Discord server](https://discord.gg/KpBNYGz)**

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@alexendre-maxim · Dec 28 '18

Thank you

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@utopian-io · Dec 25 '18

Hey, @alexendre-maxim!

**Thanks for contributing on Utopian**.
We’re already looking forward to your next contribution!

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 Simply set @utopian.pay as a 5% (or higher) payout beneficiary on your contribution post (via [SteemPlus](https://chrome.google.com/webstore/detail/steemplus/mjbkjgcplmaneajhcbegoffkedeankaj?hl=en) or [Steeditor](https://steeditor.app)).

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@alexendre-maxim · Dec 28 '18

Thank you

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