Question

How to convert all applicable characters to HTML entities in PHP

Answer 1

// string htmlentities( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 
//                       [, string $encoding = ini_get("default_charset") 
//                       [, bool $double_encode = true ]]])


$s = "I'll \"write\" 'the' <b>php</b> code";

echo htmlentities($s) . "<br />\n";
echo htmlentities($s, ENT_QUOTES);

/*
run:

I'll "write" 'the' <b>php</b> code
I'll "write" 'the' <b>php</b> code


I'll &quot;write&quot; 'the' &lt;b&gt;php&lt;/b&gt; code<br />
I&#039;ll &quot;write&quot; &#039;the&#039; &lt;b&gt;php&lt;/b&gt; code

*/

 

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Answer 2

// string htmlentities( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 
//                       [, string $encoding = ini_get("default_charset") 
//                       [, bool $double_encode = true ]]])


$s = "I'll \"write\" 'the' <b>php</b> code";

echo htmlentities($s, ENT_QUOTES, "UTF-8"). "<br />\n";
echo htmlentities($s, ENT_QUOTES | ENT_IGNORE, "UTF-8");

/*
run:

I'll "write" 'the' <b>php</b> code
I'll "write" 'the' <b>php</b> code


I&#039;ll &quot;write&quot; &#039;the&#039; &lt;b&gt;php&lt;/b&gt; code<br />
I&#039;ll &quot;write&quot; &#039;the&#039; &lt;b&gt;php&lt;/b&gt; code

*/

 

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Answer 3

// string htmlentities( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 
//                       [, string $encoding = ini_get("default_charset") 
//                       [, bool $double_encode = true ]]])


$s = "\x8F!!";

echo htmlentities($s, ENT_QUOTES, "UTF-8"). "<br />\n";
echo htmlentities($s, ENT_QUOTES | ENT_IGNORE, "UTF-8");

/*
run:

<br />
!!

*/

 

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