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