php常用处理字符串函数
addcslashes ? 为字符串里面的部分字符添加反斜线转义字符
addslashes ? 用指定的方式对字符串里面的字符进行转义
bin2hex ? 将二进制数据转换成十六进制表示
chop ? rtrim() 的别名函数
chr ? 返回一个字符的ASCII码
chunk_split ? 按一定的字符长度将字符串分割成小块
convert_cyr_string ? 将斯拉夫语字符转换为别的字符
convert_uudecode ? 解密一个字符串
convert_uuencode ? 加密一个字符串
count_chars ? 返回一个字符串里面的字符使用信息
crc32 ? 计算一个字符串的crc32多项式
crypt ? 单向散列加密函数
echo ? 用以显示一些内容
explode ? 将一个字符串用分割符转变为一数组形式
fprintf ? 按照要求对数据进行返回，并直接写入文档流
get_html_translation_table ? 返回可以转换的HTML实体
hebrev ? 将Hebrew编码的字符串转换为可视的文本
hebrevc ? 将Hebrew编码的字符串转换为可视的文本
html_entity_decode ? htmlentities ()函数的反函数，将HTML实体转换为字符
htmlentities ? 将字符串中一些字符转换为HTML实体
htmlspecialchars_decode ?htmlspecialchars()函数的反函数，将HTML实体转换为字符
htmlspecialchars ? 将字符串中一些字符转换为HTML实体
implode ? 将数组用特定的分割符转变为字符串
join ? 将数组转变为字符串，implode()函数的别名
levenshtein ? 计算两个词的差别大小
localeconv ? 获取数字相关的格式定义
ltrim ? 去除字符串左侧的空白或者指定的字符
md5_file ? 将一个文件进行MD5算法加密
md5 ? 将一个字符串进行MD5算法加密
metaphone ? 判断一个字符串的发音规则
money_format ? 按照参数对数字进行格式化的输出
nl_langinfo ? 查询语言和本地信息
nl2br ? 将字符串中的换行符“\n”替换成“
”
number_format ? 按照参数对数字进行格式化的输出
ord ? 将一个ASCII码转换为一个字符
parse_str ? 把一定格式的字符串转变为变量和值
print ? 用以输出一个单独的值
printf ? 按照要求对数据进行显示
quoted_printable_decode ? 将一个字符串加密为一个8位的二进制字符串
quotemeta ? 对若干个特定字符进行转义
rtrim ? 去除字符串右侧的空白或者指定的字符
setlocale ? 设置关于数字，日期等等的本地格式
sha1_file ? 将一个文件进行SHA1算法加密
sha1 ? 将一个字符串进行SHA1算法加密
similar_text ? 比较两个字符串，返回系统认为的相似字符个数
soundex ? 判断一个字符串的发音规则
sprintf ? 按照要求对数据进行返回，但是不输出
sscanf ? 可以对字符串进行格式化
str_ireplace ? 像str_replace()函数一样匹配和替换字符串，但是不区分大小写
str_pad ? 对字符串进行两侧的补白
str_repeat ? 对字符串进行重复组合
str_replace ? 匹配和替换字符串
str_rot13 ? 将字符串进行ROT13加密处理
str_shuffle ? 对一个字符串里面的字符进行随机排序
str_split ? 将一个字符串按照字符间距分割为一个数组
str_word_count ? 获取字符串里面的英文单词信息
strcasecmp ? 对字符串进行大小比较，不区分大小写
strchr ? 通过比较返回一个字符串的部分strstr()函数的别名
strcmp ? 对字符串进行大小比较
strcoll ? 根据本地设置对字符串进行大小比较
strcspn ? 返回字符连续非匹配长度的值
strip_tags ? 去除一个字符串里面的HTML和PHP代码
stripcslashes ? 反转义addcslashes()函数转义处理过的字符串
stripos ? 查找并返回首个匹配项的位置，匹配不区分大小写
stripslashes ? 反转义addslashes()函数转义处理过的字符串
stristr ? 通过比较返回一个字符串的部分，比较时不区分大小写
strlen ? 获取一个字符串的编码长度
strnatcasecmp ? 使用自然排序法对字符串进行大小比较，不区分大小写
strnatcmp ? 使用自然排序法对字符串进行大小比较
strncasecmp ? 对字符串的前N个字符进行大小比较，不区分大小写
strncmp ? 对字符串的前N个字符进行大小比较
strpbrk ? 通过比较返回一个字符串的部分
strpos ? 查找并返回首个匹配项的位置
strrchr ? 通过从后往前比较返回一个字符串的部分
strrev ? 将字符串里面的所有字母反向排列
strripos ? 从后往前查找并返回首个匹配项的位置，匹配不区分大小写
strrpos ? 从后往前查找并返回首个匹配项的位置
strspn ? 匹配并返回字符连续出现长度的值
strstr ? 通过比较返回一个字符串的部分
strtok ? 用指定的若干个字符来分割字符串
strtolower ? 将字符串转变为小写
strtoupper ?将字符串转变为大写
strtr ? 对字符串比较替换
substr_compare ? 对字符串进行截取后的比较
substr_count ? 计算字符串中某字符段的出现次数
substr_replace ? 对字符串中的部分字符进行替换
substr ? 对字符串进行截取
trim ? 去除字符串两边的空白或者指定的字符
ucfirst ? 将所给字符串的第一个字母转换为大写
ucwords ? 将所给字符串的每一个英文单词的第一个字母变成大写
vfprintf ? 按照要求对数据进行返回，并直接写入文档流
vprintf ? 按照要求对数据进行显示
vsprintf ? 按照要求对数据进行返回，但是不输出
wordwrap ? 按照一定的字符长度分割字符串
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