PHP Manual

Documentation

PHP function htmlspecialchars - escaping characters

2019-11-26T10:56:35.000Z

Obsah článku

Available in PHP 4, 5, 7.

Converts special characters that have meaning in HTML to HTML entities that can be rendered in the normal way.

Parameters

Parameter	Data type	Default value	Note
`$string`	`string`	not	String to be converted.
`$flags`	`int`	`ENT_COMPAT`	A bitmask of one or more of the following flags, which specify how to handle quotes, invalid code unit sequences and the used document type. The default is `ENT_COMPAT \| ENT_HTML401`.
`$encoding`	`string`	`'UTF-8'`	Defines the encoding used in conversion. If omitted, the default value for this argument is `ISO-8859-1` in versions of PHP prior to `5.4.0`, and UTF-8 from `PHP 5.4.0` onwards.
`$double_encode`	`bool`	`true`	When `double_encode` is turned off PHP will not encode existing html entities, the default is to convert everything.

Return values

string Modified string.

Other switches

Constant	Description
`ENT_SUBSTITUTE`	Replace invalid code unit sequences with a Unicode Replacement Character `U+FFFD (UTF-8)` or `&#FFFD;` (otherwise) instead of returning an empty string.
`ENT_DISALLOWED`	Replace invalid code points for the given document type with a Unicode Replacement Character `U+FFFD (UTF-8)` or `&#FFFD`; (otherwise) instead of leaving them as is. This may be useful, for instance, to ensure the well-formedness of XML documents with embedded external content.
`ENT_HTML401`	Handle code as HTML 4.01.
`ENT_XML1`	Handle code as XML 1.
	`ENT_XHTML`
	`ENT_HTML5`

Other resources

[Official htmlspecialchars documentation](- Official php.net documentation)

Jan Barášek

Jan Barášek Více o autorovi

Autor článku pracuje jako seniorní vývojář a software architekt v Praze. Navrhuje a spravuje velké webové aplikace, které znáte a používáte. Od roku 2009 nabral bohaté zkušenosti, které tímto webem předává dál.

Rád vám pomůžu:

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