PHP Custom Function Transform HTML tag example _php tips

The example in this article describes the way PHP custom functions convert HTML tags. Share to everyone for your reference, specific as follows:

<?php
/* Created on 2016-9-29
*
*
/$orig = "I ll \" Walk\ "the <b>dog</b> Now";
$a = htmlentities ($orig);
$b = Html_entity_decode ($a);
echo $a; I ' ll &quot;walk&quot; The &lt;b&gt;dog&lt;/b&gt; Now
echo $b;//I'll "walk" the <b>dog</b> now
//for users prior to PHP 4.3.0 your may does this:
function Unhtmlentities ($string)
{
  //Replace numeric entities
  $string = preg_replace (' ~& #x ([ 0-9a-f]+); ~ei ', ' Chr (Hexdec ("\\1")) ', $string);
  $string = Preg_replace (' ~&# ([0-9]+); ~e ', ' Chr ("\\1") ', $string);
  Replace literal entities
  $trans _tbl = get_html_translation_table (html_entities);
  $trans _tbl = Array_flip ($trans _tbl);
  Return Strtr ($string, $trans _tbl);
$c = unhtmlentities ($a);
Echo $c; I ' ll ' walk ' the <b>dog</b> now
?>

The results of the operation are shown in the following illustration:

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