更新日志

对本扩展的类／函数／方法有以下更新。

Version	Function	Description
5.6.5	crypt	When the failure string "0" is given as the salt, "1" will now be returned for consistency with other crypt implementations. Prior to this version, PHP 5.6 would incorrectly return a DES hash.
5.6.0	crypt	Raise E_NOTICE security warning if salt is omitted.
	html_entity_decode	The default value for the encoding parameter was changed to be the value of the default_charset configuration option.
	htmlentities	The default value for the encoding parameter was changed to be the value of the default_charset configuration option.
	htmlspecialchars	The default value for the encoding parameter was changed to be the value of the default_charset configuration option.
	substr_compare	length 可以是 0。
5.5.21	crypt	When the failure string "0" is given as the salt, "1" will now be returned for consistency with other crypt implementations. Prior to this version, PHP 5.5 (and earlier branches) would incorrectly return a DES hash.
5.5.1	hex2bin	如果输入的字符串是无效的十六进制字符串则抛出一个警告，
5.4.4	hex2bin	如果输入的字符串有多余将抛出异常。 PHP 5.4.0 起字符串将被静默地接受，但是最后的字节会被截断。
5.4.0	get_html_translation_table	The default value for the encoding parameter was changed to UTF-8.
	get_html_translation_table	The constants ENT_HTML401, ENT_XML1, ENT_XHTML and ENT_HTML5 were added.
	html_entity_decode	The constants ENT_HTML401, ENT_XML1, ENT_XHTML and ENT_HTML5 were added.
	html_entity_decode	Default encoding changed from ISO-8859-1 to UTF-8.
	htmlentities	The default value for the encoding parameter was changed to UTF-8.
	htmlentities	The constants ENT_SUBSTITUTE, ENT_DISALLOWED, ENT_HTML401, ENT_XML1, ENT_XHTML and ENT_HTML5 were added.
	htmlspecialchars	The default value for the encoding parameter was changed to UTF-8.
	htmlspecialchars	The constants ENT_SUBSTITUTE, ENT_DISALLOWED, ENT_HTML401, ENT_XML1, ENT_XHTML and ENT_HTML5 were added.
	htmlspecialchars_decode	增加了 ENT_HTML401、ENT_XML1、 ENT_XHTML 和 ENT_HTML5 等常量。
	number_format	This function now supports multiple bytes in dec_point and thousands_sep. Only the first byte of each separator was used in older versions.
5.3.7	crypt	Added $2x$ and $2y$ Blowfish modes to deal with potential high-bit attacks.
5.3.4	get_html_translation_table	The encoding parameter was added.
5.3.2	crypt	基于 Ulrich Drepper 的实现，新增基于 SHA-256 算法和 SHA-512 算法的 crypt。
	crypt	修正了 Blowfish 算法由于非法循环导致的问题，返回“失败”字符串（“0” 或 “1”）而不是转而使用 DES 算法。
5.3.0	crypt	PHP 现在包含了它自己的 MD5 Crypt 实现，包括标准 DES 算法，扩展的 DES 算法以及 Blowfish 算法。如果系统缺乏相应的实现，那么 PHP 将使用它自己的实现。
	htmlentities	The constant ENT_IGNORE was added.
	htmlspecialchars	The constant ENT_IGNORE was added.
	nl2br	新增可选的 is_xhtml 参数。
	setlocale	This function now throws an E_DEPRECATED notice if a string is passed to the category parameter instead of one of the LC_* constants.
	stristr	新增可选的 before_needle 参数。
	strlen	Prior versions treated arrays as the string Array, thus returning a string length of 5 and emitting an E_NOTICE level error.
	strstr	新增可选的 before_needle 参数。
5.2.5	addcslashes	The escape sequences \v and \f were added.
5.2.3	htmlentities	The double_encode parameter was added.
	htmlspecialchars	The double_encode parameter was added.
5.2.2 - 5.2.6	substr	If the start parameter indicates the position of a negative truncation or beyond, false is returned. Other versions get the string from start.
5.1.0	explode	支持负数的 limit
	md5_file	函数改用流 API。这意味着能够配合封装器使用该函数，比如 md5_file('http://example.com/..')。
	sha1_file	改变函数以使用流 API。这意味着可以使用包装器，比如 sha1_file('http://example.com/..')。
	str_word_count	新增 charlist 参数。
	substr_compare	允许使用负数的 offset 参数。
	substr_count	新增 offset 和 length 参数。
5.0.0	md5	新增 raw_output 参数。
	sha1	新增 raw_output 参数。
	strip_tags	strip_tags 变为二进制安全的。
	strrpos	引入 offset 参数。
	strrpos	参数 needle 可以是一个多字符的字符串。
4.3.3	substr_replace	All parameters now accept arrays.
4.3.0	stristr	stristr 变为二进制安全的。
	strrchr	该函数是二进制安全的。
	strspn	新增 start 和 length 参数。
	strstr	strstr 成为二进制安全的。
4.2.3	strcoll	函数在 Win32 平台可用。
4.1.0	trim	新增可选的 charlist 参数。
4.0.5	nl2br	nl2br 成为 XHTML 兼容的操作。所有的旧版本都会在 string 的新行之前插入 '<br>' 而不是 '<br />'。
4.0.1	explode	增加了参数 limit