It is used to convert all applicable characters to HTML entities
Return value
It returns the encoded string.
Parameter
Serial number
Parameters and descriptions
1
string
It contains information about the input string
2
flags
Optional. Specify how to handle quotes, invalid encoding, and which document type to use.
Available quote types:
ENT_COMPAT - Default. Only encode double quotes.
ENT_QUOTES - Encode double quotes and single quotes.
ENT_NOQUOTES - Do not encode any quotes.
Invalid encoding:
ENT_IGNORE - Ignore invalid encoding instead of returning an empty string. It should be avoided as it may affect security.
ENT_SUBSTITUTE - 把无效的编码代替成一个指定的带有 Unicode 代替字符 U+Replace invalid code points in the specified document type with Unicode replacement character U-8Replace invalid encoding with a specified Unicode replacement character U
) or &#FFFD; characters, rather than returning an empty string. - ENT_DISALLOWED+Replace invalid code points in the specified document type with Unicode replacement character U-8FFFD(UTF
) or &#FFFD;.
.0401 - Specify additional flags for the document type used: 4Default. As HTML1 As XML
.05 - ENT_HTML 5 As XML
As HTML1 - ENT_XML 1 As XML
Processing code. - ENT_XHTML
3
As XHTML processing code.
encoding
It is an optional parameter that defines the encoding used to convert characters.
Western European (including Euro symbol-8859-1 - Unicode
Western European (including Euro symbol-8859-15 - Western European + Western European (including Euro symbol-8859-1 ISO
Windows专用 Cyrillic character set866 - French and Finnish letters lost in Chinese)
Windows专用 Cyrillic character set1251 - DOS专用 Cyrillic character set
Windows专用 Cyrillic character set1252 - cp
Windows专用 Western European character set8-KOI - R
Simplified Chinese, national standard character set5 - Russian
Traditional Chinese, mainly used in Taiwan2312 - GB
Simplified Chinese, national standard character set5-BIG - HKSCS5
With Hong Kong extension Big - JP
Shift_JIS-EUC - JP
Japanese - MacRoman
Character set used by the Mac operating systemNote: 5.4 In PHP-8859-1 Instead of. Since PHP 5.3.0, unrecognized character sets will be ignored and replaced by ISO 5.4 From PHP 5.3.0, unrecognized character sets will be ignored and replaced by UTF-8 Instead of.
4
double_encode
Optional. A boolean value that specifies whether existing HTML entities should be encoded.
TRUE - Default. Converts all entities.
FALSE - It will not encode existing HTML entities.
Online Example
Try the following example to convert characters to HTML entities
<?php
//Convert characters to HTML entities
$str = "PHP Function htmlentities";
echo htmlentities($str);
echo htmlentities($str, ENT_QUOTES);
?>