In this tutorial, we are going to learn about how to get the first n characters of a string in PHP. In PHP, strings are the sequence of characters, where the index of the first character is 0, the second charac
Uses the "substr()" function to extract the last 3 characters from the string stored in '$str1'. The "substr()" function takes two parameters: the string to extract from ($str1), and the starting position of the substring (-3, indicating the third character from the end of the strin...
Make a string's first character lowercase 使一个字符串的第一个字符小写 levenshtein() Calculate Levenshtein distance between two strings 计算两个字符串之间的编辑距离 localeconv() Get numeric formatting information ltrim() Strip whitespace (or other characters) from the beginning of a string 删除字符串...
date_interval_create_from_date_string() 从字符串的相关部分建立 DateInterval。 date_interval_format() 格式化时间间隔。 date_isodate_set() 设置ISO 日期。 date_modify() 修改时间戳。 date_offset_get() 返回时区偏移。 date_parse_from_format() 根据指定的格式返回带有关于指定日期的详细信息的关联数组。
ip){/* PHP variables cannot contain '[' in their names, so we replace the character with a '_' */*(index_s-1)='_';// 如果没找到,则将 [ 替换成下划线index_len=0;if(index){index_len=strlen(index);}goto plain_var;return;}*ip=0;new_idx_len=strlen(index_s);// key 的长度到...
the last bytes of one character in a text followed by the first bytes of the next character may together make a valid character. str_replace() knows nothing about "characters", "character encodings" or "encoded text". It only knows about the string of bytes. To str_replace(), two adjac...
bin2hex()Converts a string of ASCII characters to hexadecimal values chop()Removes whitespace or other characters from the right end of a string chr()Returns a character from a specified ASCII value chunk_split()Splits a string into a series of smaller parts ...
// Transform the string in some way with a multibyte function // Note how we cut the string at a non-Ascii character for demonstration purposes $string = mb_substr($string, 0, 15); // Connect to a database to store the transformed string // See the PDO example in this document for...
xml_set_character_data_handler() 函数建立字符数据处理器。 xml_parser_set_option() 函数为 XML 解析器进行选项设置。 xml_parser_get_option() 函数从 XML 解析器获取选项设置信息。 xml_parser_free() 函数释放 XML 解析器。 xml_parser_create() 函数创建 XML 解析器。
Always use UTF-8 compatible versions of string manipulation functionswhen you convert strings to UTF-8 in PHP There are several PHP functions that will fail, or at least not behave as expected, if the character representation needs more than 1 byte (as UTF-8 does). An example is thestrlen...