PHP常用String函数

本文汇总了60个常用的PHP字符串处理函数,包括字符串格式化、查找、替换等操作,为PHP开发者提供实用的代码实现指南。

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UnhideWhenUsed="false" Name="Medium List 2" /> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1" /> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid" /> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 1" /> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 1" /> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 1" /> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 1" /> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 1" /> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 1" /> <w:LsdException Locked="false" UnhideWhenUsed="false" Name="Revision" /> <w:LsdException Locked="false" Priority="34" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="List Paragraph" /> <w:LsdException Locked="false" Priority="29" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Quote" /> <w:LsdException Locked="false" Priority="30" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Quote" /> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 1" /> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 1" /> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 1" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 1" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 1" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 1" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 1" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 1" /> <w:LsdException Locked="false" 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UnhideWhenUsed="false" Name="Medium Grid 2 Accent 2" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 2" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 2" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 2" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 2" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 2" /> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 3" /> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 3" /> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 3" /> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 3" /> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 3" /> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 3" /> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 3" /> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 3" /> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 3" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 3" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 3" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 3" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 3" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 3" /> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 4" /> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 4" /> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 4" /> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 4" /> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 4" /> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 4" /> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 4" /> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 4" /> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 4" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 4" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 4" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 4" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 4" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 4" /> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 5" /> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 5" /> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 5" /> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 5" /> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 5" /> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 5" /> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 5" /> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 5" /> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 5" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 5" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 5" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 5" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 5" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 5" /> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 6" /> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 6" /> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 6" /> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 6" /> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 6" /> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 6" /> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 6" /> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 6" /> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 6" /> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 6" /> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 6" /> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 6" /> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 6" /> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 6" /> <w:LsdException Locked="false" Priority="19" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis" /> <w:LsdException Locked="false" Priority="21" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis" /> <w:LsdException Locked="false" Priority="31" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference" /> <w:LsdException Locked="false" Priority="32" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Reference" /> <w:LsdException Locked="false" Priority="33" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Book Title" /> <w:LsdException Locked="false" Priority="37" Name="Bibliography" /> <w:LsdException Locked="false" Priority="39" QFormat="true" Name="TOC Heading" /> </w:LatentStyles> </xml><![endif]-->

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PHP常用字符串函数收集(60个)

1AddcSlashes 字符串加入反斜线
语法:string addcslashes(string str,string charlist);

2
AddSlashes 字符串加入反斜线
语法:string addslashes(string str);
在特定的字符前加反斜线:'"/NULL

3
bin2hex 将二进位转成十六进位
语法:string bin2hex(string str);

4
Chop 去除连续空白
语法:string chop(string str);

5
Chr Chr根据ASCII值返回字符
语法:string chr(int ascii);

6
chunk_split 将字符串分成小段
语法:string chunk_split(string string,int [chunklen],string [end]);

7
convert_cyr_string 字符串内码转换
语法:string convert_cyr_string(string str,string from,string to);

8
count_chars 返回字符串的信息
语法:mixed count_chars(string string,[mode]);

9
crypt 返回字符串用DES编码加密
语法:string crypt(string str,string [salt]);

10
echo 显示内容
语法:echo(string arg1,string [argn].....);

11
explode 切开字符串
语法:array explode(string separator,string string);

12
flush 清除输出缓冲区
语法:oid flush(void);

13
get_html_translation_table 返回函数htmlspecialchars()htmlentites()的字符转换表
语法:string get_html_translation_table(int table);

14
get_meta_tags 抽出档案所有meta标记的资料
语法:array get_meta_tags(string filename,int [use_include_path])

15
htmlentities 将所有的字元都转民HTML字符串
语法:string htmlentities(string string);

16
htmlspecialchars 将特殊字元转成HTML格式
语法:string htmlspecialchars(string string);

17
implode 将数组变成字符串
语法:string implode(string glue,array pieces);

18
join 将数组变成字符串
语法:string join(string glue,array,pieces);

19
ltrim 去除连续空白
语法:string ltrim(string str);

20
md5 使用MD5对字符串处理
语法:string md5(string str);

21
Metaphone 返回字符串的读音值
语法:string metaphome(string str);

22
nl2br 将换行字元转成<br>
语法:string nl2br(string string);

23
Ord 取得字符的ASCII码值
语法:int ord(string string);

24
parse_str(string str);
语法:vid parse_str(string str)

25
print 输出字符串
语法:print(string arg);

26
printf 输出格式化字符串
语法:int printf(string format,mixed [args]...);

27
quoted_printable_decode qp编码字符串转成八进制字符串

28
QuoteMeta 特殊字符前加入反斜线

29
rawurldecode 解码以URL方式编码的字符串
语法:string rawurldecode(string str);

30
rawurlencode 将字符串编码成URL专用格式

31
setlocale 设置本地信息
语法:string setlocale(string category,string locale);

32
similar_text 计算字符串相似度
语法:int similar_text(string first,string second,double [percent]);

33
soundex 返回字符串的读音值
语法:string soundex(string str);

34
sprintf 将字符串格式化
语法:string sprintf(string format,mixed [args]...);

35
strcasecmp 不区分大小写进行二进制方式的字符串比较
语法:int strcasecmp(string str1,string st2);

36
strchr 寻找第一个出现的字符
语法:string strchr(string haystack,string needle);

37
strcmp 区分大小写二进制方式的字符串比较
语法:int strcmp(string str1,string str2);

38
strcspn 不同字符串的长度
语法:int strcspn(string str1,string st2);

39
strip_tags 去掉HTMLPHP的标记
语法:string strip_tags(string str,string [allowable_tags]);

40
stripcslashes 删除反斜线字符串
语法:string stripcslashes(string str);

41
stripslashes 删除反斜线字符
语法:string stripslashes(string str);

42
stristr 返回一个字符串在另一个字符串中出现以后的内容
语法:string stristr(string haystack,string needle);

43
strlen 取得字符串的长度

44
strpos 取得字符串中某字符最先出现的位置
语法:int strpos(string haystack,string needle,int [offset]);

45
strrchr 取得某字符最后出现处起的字符串
语法:string strrchr(string haystack,string needle);

46
str_repet 重复一个字符串
语法:str_repeat(string input,int multiplier);

47
strrev 颠倒字符串
语法:string strrev(string string);

48
strrpos 寻找字符串中某字符最后出现的位置
语法:int strrpos(string haystack,char needle);

49
strspn 计算一个字符串在另一个字符串中出现的数目
语法:int strspn(string str1,string str2);

50
strstr 返回一个字符串在另一个字符串中出现以后的内容
语法:string strstr(string haystack,string needle);

51
strtok 切开字符串
语法:string strtok(string arg1, string arg2);
以字符串arg2为分隔符,切开字符串arg1arg2中可以放入多个分隔符。

52
strtolower 字符串全转为小写
语法:string strtolower(string str);

53
strtoupper 字符串全转为大写
语法:string strtoupper(string str);

54
str_replace 字符串替换
语法:str_replace(string needle,string str,string haystack);
在字符串haystack中替换所有字符串strneedle。本函数可以使用ereg_replace()代替。

55
strtr 字符串替换
语法:string strtr(string str, string from, string to);
字符替换,将字符串str中包含from字符的一一对应地换为to中的字符。如果fromto的字符数不相同,将忽略多出的字符,这个函数的替换是字符,而不是单词或字符串替换。

56
substr 取部分字符串
语法:string substr(string string, int start, int [length]);

57
substr_replace 字符串替换
语法:string substr_replace(string string,string replacement, int start, int [length]);
string中提取字符串,并且以字符串replacement替换,参数startlength的定义及使用与subxstr相同。

58
trim 截去字符串首尾的空格
语法:string trim(string str);

59
ucfirst 将字符串第一个字符改为大写
语法:string ucfirst(string str);

60
ucwords 将字符串每个单词第一个字母改大写
语法:string ucwords(string str);

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