htmlentities() vs. htmlspecialchars()

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What are the differences between htmlspecialchars() and htmlentities(). When should I use one or the other?


From the PHP documentation for htmlentities:

This function is identical to htmlspecialchars() in all ways, except with htmlentities(), all characters which have HTML character entity equivalents are translated into these entities.

From the PHP documentation for htmlspecialchars:

Certain characters have special significance in HTML, and should be represented by HTML entities if they are to preserve their meanings. This function returns a string with some of these conversions made; the translations made are those most useful for everyday web programming. If you require all HTML character entities to be translated, use htmlentities() instead.

The difference is what gets encoded. The choices are everything (entities) or "special" characters, like ampersand, double and single quotes, less than, and greater than (specialchars).

I prefer to use htmlspecialchars whenever possible.

For example:

    echo htmlentities('<Il était une fois un être>.');
    // Output: &lt;Il &eacute;tait une fois un &ecirc;tre&gt;.
    //                ^^^^^^^^                 ^^^^^^^

    echo htmlspecialchars('<Il était une fois un être>.');
    // Output: &lt;Il était une fois un être&gt;.
    //                ^                 ^

What is the difference between htmlspecialchars() and htmlentities , htmlspecialchars() function convert the special characters to HTML entities. htmlentities() function convert all applicable characters to HTML entities. htmlentities() vs htmlspecialchars() Function in PHP htmlentities() Function The htmlentities() function is an inbuilt function in PHP which is used to transform all characters which are applicable to HTML entities.


htmlspecialchars may be used:

  1. When there is no need to encode all characters which have their HTML equivalents.

    If you know that the page encoding match the text special symbols, why would you use htmlentities? htmlspecialchars is much straightforward, and produce less code to send to the client.

    For example:

    echo htmlentities('<Il était une fois un être>.');
    // Output: &lt;Il &eacute;tait une fois un &ecirc;tre&gt;.
    //                ^^^^^^^^                 ^^^^^^^
    
    echo htmlspecialchars('<Il était une fois un être>.');
    // Output: &lt;Il était une fois un être&gt;.
    //                ^                 ^
    

    The second one is shorter, and does not cause any problems if ISO-8859-1 charset is set.

  2. When the data will be processed not only through a browser (to avoid decoding HTML entities),

  3. If the output is XML (see the answer by Artefacto).

When used correctly, is htmlspecialchars sufficient for protection , From the PHP documentation for htmlentities: This function is identical to htmlspecialchars() in all ways, except with htmlentities() , all characters which have  htmlspecialchars — Convert special characters to HTML entities. Description : Html Code. string htmlspecialchars ( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = ini_get ("default_charset") [, bool $double_encode = true ]]] ) Certain characters have special significance in HTML, and should be represented by HTML entities if they are to preserve their meanings.


htmlentities() vs htmlspecialchars() Function in PHP, and: There are no <script> tags in the document. htmlspecialchars () :-. htmlspecialchars () only takes care of predefined characters <, >, single quote ‘, double quote ” and ampersand (&), and converts these characters in to html entities.


This is being encoded with htmlentities.

implode( "\t", array_values( get_html_translation_table( HTML_ENTITIES ) ) ):

" & < > ¡ ¢ £ ¤ ¥ ¦ § ¨ © ª « ¬ ­ ® ¯ ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ ÿ Œ œ Š š Ÿ ƒ ˆ ˜ Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ ς σ τ υ φ χ ψ ω ϑ ϒ ϖ       ‌ ‍ ‎ ‏ – — ‘ ’ ‚ " " „ † ‡ • … ‰ ′ ″ ‹ › ‾ ⁄ € ℑ ℘ ℜ ™ ℵ ← ↑ → ↓ ↔ ↵ ⇐ ⇑ ⇒ ⇓ ⇔ ∀ ∂ ∃ ∅ ∇ ∈ ∉ ∋ ∏ ∑ − ∗ √ ∝ ∞ ∠ ∧ ∨ ∩ ∪ ∫ ∴ ∼ ≅ ≈ ≠ ≡ ≤ ≥ ⊂ ⊃ ⊄ ⊆ ⊇ ⊕ ⊗ ⊥ ⋅ ⌈ ⌉ ⌊ ⌋ ⟨ ⟩ ◊ ♠ ♣ ♥ ♦

This is being encoded with htmlspecialchars.

implode( "\t", array_values( get_html_translation_table( HTML_SPECIALCHARS ) ) ):

" & < >

PHP htmlspecialchars Function, function in PHP is used to convert 5 characters into corresponding HTML entities where applicable. It is used to encode user input on a website so that users cannot insert harmful HTML codes into a site. The htmlspecialchars() function converts some predefined characters to HTML entities. The predefined characters are: * & (ampersand) becomes &amp; * "; (double quote


htmlentities() vs htmlspecialchars() for a valid XML with PHP. Apr 30, 2019. Electronic invoice issuance is compulsory for 100% of issuers in Brazil. It is the  The differences between htmlspecialchars() and htmlentities() is very small. Lets see some examples: htmlspecialchars. htmlspecialchars(string $string) takes multiple arguments where as the first argument is a string and all other arguments (certain flags, certain encodings etc. ) are optional.


If it can be stated very simply, is this the only difference between htmlspecialchars​() and htmlentities() in PHP? htmlspecialchars() will change. < > & " into the <  htmlentities vs htmlspecialchars. Both will prevent XSS attacks. The difference is in the characters each encodes. htmlentities will encode ANY character that has an HTML entity equivalent. htmlspecialchars ONLY encodes a small set of the most problematic characters.


htmlspecialchars() only takes care of predefined characters <, >, single quote ', double quote ” and ampersand(&), and converts these characters in to html entities. With older versions, I assume using htmlentities() or htmlspecialchars() is a must, as stated with previous notes here. Also I use the charset UTF-8 in my HTML and XML and am not sure if this also effects the results I get.


The htmlspecialchars() function is an inbuilt function in PHP which is used to convert all predefined characters to HTML entities. Syntax: string htmlspecialchars( $  Function htmlentities is better if you are expecting the use of charsets which may contain different special characters or symbols. On the other side, htmlspecialchars won’t try to translate anything except HTML reserved characters so it won’t plague your text with entities for “everything” which can be an issue at a later time.