Special character decode php

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htmlspecialchars_decode

This function is the opposite of htmlspecialchars() . It converts special HTML entities back to characters.

The converted entities are: & , " (when ENT_NOQUOTES is not set), ' (when ENT_QUOTES is set), < and > .

Parameters

A bitmask of one or more of the following flags, which specify how to handle quotes and which document type to use. The default is ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401 .

Available flags constants

Constant Name	Description
ENT_COMPAT	Will convert double-quotes and leave single-quotes alone.
ENT_QUOTES	Will convert both double and single quotes.
ENT_NOQUOTES	Will leave both double and single quotes unconverted.
ENT_SUBSTITUTE	Replace invalid code unit sequences with a Unicode Replacement Character U+FFFD (UTF-8) or � (otherwise) instead of returning an empty string.
ENT_HTML401	Handle code as HTML 4.01.
ENT_XML1	Handle code as XML 1.
ENT_XHTML	Handle code as XHTML.
ENT_HTML5	Handle code as HTML 5.

Return Values

Returns the decoded string.

Changelog

Version	Description
8.1.0	flags changed from ENT_COMPAT to ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401 .

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htmlspecialchars_decode

Эта функция является антиподом htmlspecialchars() . Она преобразует специальные HTML-сущности обратно в соответствующие символы.

Конвертируемые сущности : &, " (когда ENT_NOQUOTES не установлена), ' (когда ENT_QUOTES установлена), < и >.

Список параметров

Строка, которую надо преобразовать.

Битовая маска из одного или нескольких следующих флагов, которые указывают как обрабатывать кавычки и какие типы документов использовать. Значением по умолчанию является ENT_COMPAT | ENT_HTML401.

Доступные константы, используемые в качестве параметра flags

Имя константы	Описание
ENT_COMPAT	Преобразует двойные кавычки и пропускает одинарные.
ENT_QUOTES	Преобразует и двойные, и одинарные кавычки.
ENT_NOQUOTES	Не преобразует ни двойные, ни одинарные кавычки.
ENT_HTML401	Обрабатывать код как HTML 4.01.
ENT_XML1	Обрабатывать код как XML 1.
ENT_XHTML	Обрабатывать код как XHTML.
ENT_HTML5	Обрабатывать код как HTML 5.

Возвращаемые значения

Возвращает преобразованную строку.

Список изменений

Версия	Описание
5.4.0	Добавлены константы ENT_HTML401 , ENT_XML1 , ENT_XHTML и ENT_HTML5 .

Примеры

Пример #1 Пример использования функции htmlspecialchars_decode()

echo htmlspecialchars_decode ( $str );

// обратите внимание, что в данном случае кавычки не будут преобразованы
echo htmlspecialchars_decode ( $str , ENT_NOQUOTES );
?>

Результат выполнения данного примера:

Смотрите также

• htmlspecialchars() — Преобразует специальные символы в HTML-сущности
• html_entity_decode() — Преобразует все HTML-сущности в соответствующие символы
• get_html_translation_table() — Возвращает таблицу преобразований, используемую функциями htmlspecialchars и htmlentities

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PHP htmlspecialchars_decode() Function

Convert the predefined HTML entities «<» (less than) and «>» (greater than) to characters:

The HTML output of the code above will be (View Source):

The browser output of the code above will be:

Definition and Usage

The htmlspecialchars_decode() function converts some predefined HTML entities to characters.

HTML entities that will be decoded are:

• & becomes & (ampersand)
• " becomes » (double quote)
• ' becomes ‘ (single quote)
• < becomes < (less than)
• > becomes > (greater than)

The htmlspecialchars_decode() function is the opposite of htmlspecialchars().

Syntax

Parameter Values

Parameter	Description
string	Required. Specifies the string to decode
flags	Optional. Specifies how to handle quotes and which document type to use.

The available quote styles are:

• ENT_COMPAT — Default. Decodes only double quotes
• ENT_QUOTES — Decodes double and single quotes
• ENT_NOQUOTES — Does not decode any quotes

Additional flags for specifying the used doctype:

• ENT_HTML401 — Default. Handle code as HTML 4.01
• ENT_HTML5 — Handle code as HTML 5
• ENT_XML1 — Handle code as XML 1
• ENT_XHTML — Handle code as XHTML

Technical Details

Return Value:	Returns the converted string
PHP Version:	5.1.0+
Changelog:	PHP 5.4 — Added ENT_HTML401, ENT_HTML5, ENT_XML1 and ENT_XHTML.

More Examples

Example

Convert some predefined HTML entities to characters:

$str = «Jane & 'Tarzan'»;
echo htmlspecialchars_decode($str, ENT_COMPAT); // Will only convert double quotes
echo «
«;
echo htmlspecialchars_decode($str, ENT_QUOTES); // Converts double and single quotes
echo «
«;
echo htmlspecialchars_decode($str, ENT_NOQUOTES); // Does not convert any quotes
?>

The HTML output of the code above will be (View Source):

The browser output of the code above will be:

Example

Convert the predefined HTML entities to double quotes:

$str = ‘I love "PHP".’;
echo htmlspecialchars_decode($str, ENT_QUOTES); // Converts double and single quotes
?>

The HTML output of the code above will be (View Source):

The browser output of the code above will be:

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