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PHP常用字符串处置函数

Jun 13, 2016 pm 12:53 PM
html int str string substr

PHP常用字符串处理函数

PHP字符串操作常用函数

/*

* 确定字符串长度

* int strlen(string str)

* 比较两个字符串

* 1、strcmp函数对两个字符串进行二进制安全的比较,并区分大小写

* int strcmp(string str1,string str2)

* 2、以不区分大小写的方式比较两个字符串

* int strcasecmp(string str1,string str2)

* 3、求两个字符串相同部分

* int strspn(string str1,string str2)

* 4、求两个字符串的不同部分

* int strcspn(string str1,string str2)

* 处理字符串大小写

* 1、将字符串全部转换为小写

* string strtolower(string str)

* 2、将字符串全部转化为大写

* string strtoupper(string str)

* 3、将字符串第一个字符大写

* string ucfirst(string str)

* 4、将字符串中的每个单词变成大写

* string ucword(string str)

* 字符串与HTML相互转换

* 1、将换行符转换为HTML终止标记

* string bl2br(string str)

* 2、将特殊字符转换wieldHTML等价形式

* string htmlentities(string str[,int quote_style[,int charset]])

* 3、使用特殊的HTML字符用于其他目的

* string htmlspecialchars(string str[,int quote_style[,string charset]])

* 4、将文本转换为HTML等价形式

* array get_html_translaction_table(int table[,int quote_style])

* 5、创建一个自定义的转换清单

* string strtr(string str,array replacements)

* 6、将HTML转换为纯文本

* string strip_tags(string str[,string allowable_tags])

* 正则表达式函数的替代函数

* 1、strtok函数根据预定义的字符串列表来解析字符串

* string strtok(string str,string tonens)

* 2、根据预定义的定界符分析字符串

* array explode(string separator,string str[,int limit])

* 3、将数组转换为字符串

* string implode(string delimiter, array array)

* 4、解析复杂的字符串

* int strpos(string str,string substr[,int offset])

* 5、找到字符串的最后一次出现

* int strrpos(string str,char substr[,offset])

* 6、用另外一个字符串替代字符串的所有实例

* mixed str_replace(string occurrence,mixed replacement,mixed str[,int count])

* 7、获取字符串的一部分strstr返回字符串中预定义字符串第一次出现开始的剩余部分

* string strstr(string str,string occurrence)

* 8、根据预定义的偏移返回字符串一部分

* string substr(string str,int start[,ing length])

* 9、确定字符串出现的频率

* int substr_count(string str,string substring)

* 10、用另一个字符串替换一个字符串的一部分

* string substr_replace(string str,string replacement,int start[,int length])

* 填充和剔除字符串

* 1、从字符串开始出裁剪字符

* string ltrim(string str[,string charliset])

* 2、从字符串结尾裁剪字符

* string rtrim(string str[,string charliset])

* 3、从字符串两端裁剪字符

* string trim(string str[,string charliset])

* 4、填充字符串

* string str_pad(string str,int length[,string pad_string[,int pad_type]])

* 字符和单词计数

* 1、字符串中字符计数

* mixed count_chars(string str[,mode])

* 2、字符串中单词总数计数

* mixed str_word_count(string str[,int format])

*/

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