\u5728\u7f16\u7a0b\u7684\u8fc7\u7a0b\u5f53\u4e2d,\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\u5e76\u4e14\u7ecf\u5e38\u4f1a\u88ab\u7528\u5230,\u5b57\u7b26\u4e32\u5e38\u7528\u7684\u64cd\u4f5c\u5177\u4f53\u7684\u5305\u62ec\u5b57\u7b26\u4e32\u7684\u62fc\u63a5,\u66ff\u6362\u5b57\u7b26\u4e32,\u67e5\u627e\u5b57\u7b26\u4e32,\u6bd4\u8f83\u5b57\u7b26\u4e32,\u590d\u5236\u5b57\u7b26\u4e32\u4ee5\u53ca\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u7b49\u7b49.<\/p>\n
1,\u62fc\u63a5\u5b57\u7b26\u4e32
\u62fc\u63a5\u5b57\u7b26\u4e32\u662f\u6700\u5e38\u7528\u5230\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u4e4b\u4e00,\u5728PHP\u4e2d\u652f\u6301\u4e09\u79cd\u65b9\u5f0f\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u62fc\u63a5\u64cd\u4f5c,\u5206\u522b\u662f\u5706\u70b9.\u5206\u9694\u7b26{}\u64cd\u4f5c,\u8fd8\u6709\u5706\u70b9\u7b49\u53f7.=\u6765\u8fdb\u884c\u64cd\u4f5c,\u5706\u70b9\u7b49\u53f7\u53ef\u4ee5\u628a\u4e00\u4e2a\u6bd4\u8f83\u957f\u7684\u5b57\u7b26\u4e32\u5206\u89e3\u4e3a\u51e0\u884c\u8fdb\u884c\u5b9a\u4e49,\u8fd9\u6837\u505a\u662f\u6bd4\u8f83\u6709\u597d\u5904\u7684.<\/p>\n
2,\u66ff\u6362\u5b57\u7b26\u4e32
\u5728PHP\u8fd9\u95e8\u8bed\u8a00\u4e2d,\u63d0\u4f9b\u4e86\u4e00\u4e2a\u540d\u5b57\u53eb\u505asubstr_replace()\u7684\u51fd\u6570,\u8be5\u51fd\u6570\u7684\u4f5c\u7528\u53ef\u4ee5\u5feb\u901f\u7684\u5b8c\u6210\u626b\u63cf\u548c\u7f16\u8f91\u6587\u672c\u5185\u5bb9\u8f83\u591a\u7684\u5b57\u7b26\u4e32\u66ff\u6362\u529f\u80fd.\u4ed6\u7684\u8bed\u6cd5\u683c\u5f0f:
mixed substr_replace(mixed $string,string $replacement, int $start[,int $length])
\u5bf9\u4e8e\u4e0a\u9762\u7684\u8bed\u6cd5\u683c\u5f0f\u7684\u8bf4\u660e:
string \u662f\u8981\u68c0\u67e5\u6216\u8005\u5c06\u8981\u88ab\u66ff\u6362\u7684\u5b57\u7b26\u4e32
replacement \u6307\u5b9a\u8981\u7528\u6765\u63d2\u5165\u6216\u8005\u66ff\u6362\u7684\u5b57\u7b26\u4e32
start \u6307\u5b9a\u5728\u5b57\u7b26\u4e32\u7684\u4f55\u5904\u8fdb\u884c\u5f00\u59cb\u66ff\u6362,\u8fd9\u4e2a\u53c2\u6570\u53ef\u4ee5\u53d6\u4e09\u79cd\u7c7b\u578b\u7684\u503c(\u6b63\u6570:\u4ece\u5b57\u7b26\u4e32\u5f00\u5934\u7684\u7b2cstart\u4e2a\u504f\u79fb\u91cf\u5f00\u59cb\u66ff\u6362,\u8d1f\u6570,\u4ece\u5b57\u7b26\u4e32\u7ed3\u5c3e\u5904\u7684\u7b2cstart\u4e2a\u504f\u79fb\u91cf\u5f00\u59cb\u66ff\u6362,0:\u4ece\u5b57\u7b26\u4e32\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u5f00\u59cb\u66ff\u6362)
length\u6307\u5b9a\u8981\u66ff\u6362\u591a\u5c11\u4e2a\u5b57\u7b26,\u8fd9\u4e2a\u53c2\u6570\u4e5f\u53ef\u4ee5\u53d6\u4e09\u79cd\u7c7b\u578b\u7684\u503c(\u6b63\u6570:\u88ab\u66ff\u6362\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6,\u8d1f\u6570:\u4ece\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\u5f00\u59cb\u88ab\u66ff\u6362\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6,0:\u662f\u63d2\u5165\u64cd\u4f5c,\u800c\u4e0d\u662f\u66ff\u6362\u64cd\u4f5c);<\/p>\n
3,\u8ba1\u7b97\u5b57\u7b26\u4e32<\/p>\n
1)\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u957f\u5ea6
\u5728PHP\u4e2d,strlen()\u51fd\u6570\u7528\u6765\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5e76\u4e14\u8fd4\u56de\u8be5\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4fe1\u606f.\u8be5\u8bed\u6cd5\u7684\u683c\u5f0f\u5982\u4e0b:int strlen(string $string)\u683c\u5f0f\u91cc\u9762\u7684string\u5c31\u662f\u7528\u6765\u6307\u5b9a\u8981\u8ba1\u7b97\u957f\u5ea6\u7684\u5b57\u7b26\u4e32.<\/p>\n
2)\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u6570\u76ee
\u5728PHP\u4e2d,substr_count()\u51fd\u6570,\u53ef\u4ee5\u7528\u6765\u975e\u5e38\u65b9\u4fbf\u800c\u4e14\u51c6\u786e\u7684\u786e\u5b9a\u4e00\u4e2a\u6307\u5b9a\u7684\u5b50\u5b57\u7b26\u4e32\u5728\u6240\u63d0\u4f9b\u7684\u5b57\u7b26\u4e32\u4e2d\u6709\u591a\u5c11\u4e2a,substr_count()\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:int substr_count(string $haystack,string $needle[,int $offset=0[,int $length]])\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d\u8bbe\u8ba1\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0b:haystack\u6307\u5b9a\u8981\u68c0\u67e5\u7684\u5b57\u7b26\u4e32,needle\u7528\u6765\u6307\u5b9a\u8981\u63d2\u5165\u7684\u5b57\u7b26\u4e32,offset\u7528\u6765\u6307\u5b9a\u5728\u5b57\u7b26\u4e32\u4e2d\u4f55\u5904\u5f00\u59cb\u641c\u7d22,\u9ed8\u8ba4\u503c\u4e3a0,length\u7528\u6765\u6307\u5b9a\u641c\u7d22\u7684\u957f\u5ea6.
\u5728PHP\u4e2d,str_word_count()\u51fd\u6570,\u53ef\u4ee5\u7528\u6765\u975e\u5e38\u65b9\u4fbf\u800c\u4e14\u51c6\u786e\u7684\u786e\u5b9a\u4e00\u4e2a\u67d0\u4e00\u4e2a\u5355\u8bcd\u5728\u6240\u63d0\u4f9b\u7684\u5b57\u7b26\u4e32\u4e2d\u6709\u591a\u5c11\u4e2a,str_word_count()\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:mixed str_word_count(string $string[,int $format=0[,string $charlist]])\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d\u6d89\u53ca\u5230\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0b:string\u7528\u6765\u6307\u5b9a\u8981\u8fdb\u884c\u68c0\u67e5\u7684\u5b57\u7b26\u4e32,format\u7528\u6765\u6307\u5b9astr_word_count()\u51fd\u6570\u7684\u8fd4\u56de\u503c,\u8fd9\u4e2a\u53c2\u6570\u7684\u8fd4\u56de\u503c\u53ef\u4ee5\u8fd4\u56de\u4e09\u4e2a\u503c,\u5206\u522b\u662f0,1,2.\u5176\u4e2d\u8fd4\u56de0\u7684\u610f\u601d\u662f\u9ed8\u8ba4\u503c,\u8fd4\u56de\u627e\u5230\u7684\u5355\u8bcd\u7684\u6570\u76ee,\u5982\u679c\u8fd4\u56de\u503c\u4e3a1\u7684\u8bdd,\u90a3\u4e48str_word_count()\u8fd4\u56de\u7684\u5c31\u662f\u4e00\u4e2a\u6570\u7ec4,\u5176\u4e2d\u7684\u952e\u540d\u662f\u4ece0\u5f00\u59cb\u7684\u8fde\u7eed\u6574\u6570,\u503c\u662f\u5b9e\u9645\u7684\u5355\u8bcd.\u5982\u679cformat\u7684\u503c\u53d63\u7684\u65f6\u5019,\u90a3\u4e48str_word_count()\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5c31\u662f\u4e00\u4e2a\u6570\u7ec4,\u5176\u4e2d,\u6570\u7ec4\u7684\u952e\u540d\u662f\u5355\u8bcd\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e,\u503c\u662f\u5b9e\u9645\u7684\u5355\u8bcd.<\/p>\n
4,\u67e5\u627e\u5b57\u7b26\u4e32<\/p>\n
\u5b57\u7b26\u4e32\u7684\u67e5\u627e\u53ef\u4ee5\u5206\u4e3a\u5f88\u591a\u79cd,\u6bd4\u5982\u8bf4\u67e5\u627e\u5b50\u5b57\u7b26\u4e32,\u67e5\u627e\u67d0\u4e2a\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\u7b49\u7b49,PHP\u5206\u522b\u4e3a\u6bcf\u4e2a\u5b57\u7b26\u4e32\u67e5\u627e\u64cd\u4f5c\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u51fd\u6570.<\/p>\n
1)\u67e5\u627e\u5b50\u5b57\u7b26\u4e32
\u5728PHP\u8bed\u8a00\u4e2d,strstr()\u51fd\u6570\u53ef\u4ee5\u7528\u6765\u67e5\u627e\u5b50\u5b57\u7b26\u4e32,\u8be5\u51fd\u6570\u8fd4\u56de\u7684\u7ed3\u679c\u4e3a\u5b50\u5b57\u7b26\u4e32\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u6240\u6709\u7684\u5185\u5bb9,strstr()\u51fd\u6570\u7684\u683c\u5f0f\u5982\u4e0b:string strstr(string $haystack,mixed $needle)\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d,\u6d89\u53ca\u5230\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0bhaystack:\u6307\u5b9a\u88ab\u641c\u7d22\u7684\u5b57\u7b26\u4e32,needle\u6307\u5b9a\u6240\u8981\u641c\u7d22\u7684\u5b57\u7b26\u4e32,\u5982\u679c\u8be5\u53c2\u6570\u662f\u6570\u5b57\u7684\u8bdd,\u5219\u4f1a\u5339\u914d\u5668\u8be5\u6570\u5b57ASCII\u503c\u7684\u5b57\u7b26.\u5728\u5b9e\u9645\u7684\u5e94\u7528\u5f53\u4e2d,\u4f1a\u51fa\u73b0\u8981\u5ffd\u7565\u5b57\u6bcd\u5927\u5c0f\u5199\u7684\u60c5\u51b5,\u8fd9\u4e2a\u65f6\u5019,\u53ef\u4ee5\u4f7f\u7528PHP\u63d0\u4f9b\u7684\u4e00\u4e2a\u5927\u5c0f\u5199\u4e0d\u654f\u611f\u7684\u67e5\u627e\u51fd\u6570–stristr()\u51fd\u6570,\u8be5\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u548cstrstr()\u51fd\u6570\u7684\u4f7f\u7528\u662f\u4e00\u6837\u7684.<\/p>\n
2)\u67e5\u627e\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e
strpos()\u51fd\u6570\u7684\u529f\u80fd\u548cstrstr()\u51fd\u6570\u662f\u7c7b\u4f3c\u7684,\u53ea\u662f\u8fd4\u56de\u7684\u4e0d\u662f\u5b57\u7b26\u4e32,\u800c\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u5728\u53e6\u5916\u4e00\u4e2a\u5b57\u7b26\u4e32\u5f53\u4e2d\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e,strpos()\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:int strpos(string $haystack,mixed $needle[,int $offset =0])\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d\u6d89\u53ca\u5230\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0b:haystack\u662f\u8981\u88ab\u641c\u7d22\u7684\u5b57\u7b26\u4e32,needle\u6307\u5b9a\u8981\u8fdb\u884c\u67e5\u627e\u7684\u5b57\u7b26\u4e32,offset\u662f\u6307\u5b9a\u5f00\u59cb\u641c\u7d22\u7684\u4f4d\u7f6e,\u9ed8\u8ba4\u503c\u4e3a0.
strpos()\u51fd\u6570\u662f\u4e00\u4e2a\u5bf9\u5927\u5c0f\u5199\u654f\u611f\u7684\u67e5\u627e\u51fd\u6570,\u4f46\u662f\u5728\u5b9e\u9645\u7684\u5e94\u7528\u8fc7\u7a0b\u5f53\u4e2d\u5f80\u5f80\u4f1a\u51fa\u73b0\u9700\u8981\u5ffd\u7565\u5927\u5c0f\u5199\u7684,\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528PHP\u63d0\u4f9b\u7684\u4e00\u4e2a\u5bf9\u5927\u5c0f\u5199\u4e0d\u662f\u5f88\u654f\u611f\u7684\u67e5\u627e\u51fd\u6570stripos(),\u8be5\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u548cstrpos()\u662f\u4e00\u6837\u7684.<\/p>\n
5,\u6bd4\u8f83\u5b57\u7b26\u4e32
\u5728PHP\u8bed\u8a00\u4e2d,\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0:\u4f7f\u7528”==”\u64cd\u4f5c\u7b26\u6bd4\u8f83\u548c\u4f7f\u7528\u51fd\u6570\u8fdb\u884c\u6bd4\u8f83<\/p>\n
1)\u4f7f\u7528”==”\u64cd\u4f5c\u7b26\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5927\u5c0f
\u5728PHP\u4e2d\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u65f6\u5019,\u6700\u5bb9\u6613\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528\u53cc\u7b49\u53f7\u64cd\u4f5c\u7b26(==).<\/p>\n
2)\u4f7f\u7528\u51fd\u6570\u6bd4\u8f83\u5b57\u7b26\u4e32\u7684\u5927\u5c0f
\u5728PHP\u4e2d\u63d0\u4f9b\u7684strcmp()\u51fd\u6570\u53ef\u4ee5\u66f4\u52a0\u7cbe\u786e\u7684\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5927\u5c0f,\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0bint strcmp(string $str1,string $str2)\u5728\u4e0a\u8ff0\u8bed\u6cd5\u4e2d\u6d89\u53ca\u5230\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0b:str1 \u6307\u5b9a\u8981\u8fdb\u884c\u6bd4\u8f83\u7684\u5b57\u7b26\u4e321,str2\u6307\u5b9a\u8981\u8fdb\u884c\u6bd4\u8f83\u7684\u5b57\u7b26\u4e322.\u8fd9\u4e2astrcmp\u8c19\u719f\u53ef\u4ee5\u786e\u4fdd\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u5b8c\u5168\u5339\u914d,\u5e76\u5c06\u6bd4\u8f83\u7ed3\u679c\u4ee5\u6574\u6570\u7684\u5f62\u5f0f\u8fd4\u56de,\u8fd9\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u6709\u4ee5\u4e0b\u4e09\u79cd.0:\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u76f8\u7b49\u7684,\u5c0f\u4e8e0\u7684\u65f6\u5019,\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5c0f\u4e8e\u540e\u9762\u7684\u5b57\u7b26\u4e32\u7684,\u5982\u679c\u8fd4\u56de\u503c\u662f\u5927\u4e8e\u96f6\u7684,\u90a3\u4e48\u5c31\u8bf4\u660e,\u524d\u9762\u7684\u5b57\u7b26\u4e32\u662f\u5927\u4e8e\u540e\u9762\u7684\u5b57\u7b26\u4e32\u7684.
\u9664\u4e86strcmp()\u51fd\u6570\u4e4b\u5916,PHP\u8fd8\u63d0\u4f9b\u4e86\u53e6\u5916\u4e00\u4e9b\u6bd4\u8f83\u7c7b\u4f3c\u7684\u6bd4\u8f83\u51fd\u6570,\u6bd4\u5982strncmp()\u51fd\u6570\u53ef\u4ee5\u9009\u62e9\u60f3\u8981\u6bd4\u8f83\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6(\u5b57\u7b26\u4e2a\u6570),\u5176\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:int strcmp(string $str1,string $str2,int $len)\u4e0a\u9762\u7684\u53c2\u6570\u8bf4\u660e str1:\u6307\u5b9a\u8981\u6bd4\u8f83\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32,str2:\u6307\u5b9a\u8981\u6bd4\u8f83\u7684\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32len:\u6307\u5b9a\u6bcf\u4e2a\u5b57\u7b26\u4e32\u7528\u4e8e\u6bd4\u8f83\u7684\u5b57\u7b26\u4e2a\u6570.
\u5728\u6bd4\u8f83\u5b57\u7b26\u4e32\u7684\u65f6\u5019,\u6709\u7684\u65f6\u5019\u9700\u8981\u5ffd\u7565\u5927\u5c0f\u5199,\u5c31\u53ef\u4ee5\u4f7f\u7528strcasemp()\u51fd\u6570\u548cstrncasemp()\u51fd\u6570,\u8fd9\u4e24\u4e2a\u51fd\u6570\u4e0e\u533a\u5206\u5927\u5c0f\u5199\u7684\u76f8\u5e94\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u662f\u5b8c\u5168\u76f8\u540c\u7684,strcasecmp()\u51fd\u6570\u548cstrncasecmp()\u4e24\u4e2a\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5206\u522b\u5982\u4e0b:
int strcasecmp(string $str1,string $str2)
int strncasecmp(string $str1,string $str2,int $len)<\/p>\n
6,\u590d\u5236\u5b57\u7b26\u4e32
\u5982\u679c\u9700\u8981\u91cd\u590dn\u6b21\u663e\u793a\u4e00\u4e2a\u5b57\u7b26\u6216\u8005\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u529f\u80fd,\u5219\u6700\u7b80\u5355\u7684\u5b9e\u73b0\u65b9\u6cd5\u5c31\u662f\u8c03\u7528\u590d\u5236\u51fd\u6570,\u5728PHP\u4e2d\u53ef\u4ee5\u4f7f\u7528str_repeat()\u51fd\u6570\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u590d\u5236,\u8fd9\u4e2a\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:string str_repeat(string $input,int $multiplier)\u5728\u4e0a\u8ff0\u7684\u8bed\u6cd5\u4e2d\u8bbe\u8ba1\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0binput\u6307\u5b9a\u8981\u91cd\u590d\u7684\u5b57\u7b26\u4e32,multiplier\u6307\u5b9a\u5b57\u7b26\u4e32\u5c06\u88ab\u91cd\u590d\u7684\u6b21\u6570.<\/p>\n
7,\u7ffb\u8f6c\u5b57\u7b26\u4e32
\u5904\u7406\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u8fd8\u5305\u62ec\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u7ffb\u8f6c\u5728PHP\u8bed\u8a00\u4e2d,\u4f7f\u7528strrev()\u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u53cd\u8f6c\u5b57\u7b26\u4e32\u7684\u529f\u80fd,strrev()\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u4e3a
string strrev(string $string)
\u4e0a\u9762\u7684\u53c2\u6570string\u5c31\u662f\u7528\u4e8e\u6307\u5b9a\u8981\u8fdb\u884c\u7ffb\u8f6c\u7684\u5b57\u7b26\u4e32.<\/p>\n
8,\u5207\u5206,\u5408\u5e76\u5b57\u7b26\u4e32
\u628a\u4e00\u4e2a\u5b57\u7b26\u4e32\u6309\u7167\u67d0\u79cd\u89c4\u5219\u5207\u5206\u6210\u591a\u4e2a\u5b57\u7b26\u4e32,\u6216\u8005\u628a\u591a\u4e2a\u5b57\u7b26\u4e32\u5408\u5e76\u6210\u4e00\u4e2a\u957f\u7684\u5b57\u7b26\u4e32,\u662f\u5728\u5904\u7406\u5b57\u7b26\u4e32\u64cd\u4f5c\u7684\u65f6\u5019\u4f1a\u7ecf\u5e38\u78b0\u5230\u7684\u95ee\u9898.\u4f7f\u7528PHP\u63d0\u4f9b\u7684explode()\u51fd\u6570,str_split()\u51fd\u6570,implode()\u51fd\u6570\u53ef\u4ee5\u5904\u7406\u7c7b\u4f3c\u5207\u5206,\u5408\u5e76\u5b57\u7b26\u4e32\u7684\u95ee\u9898.<\/p>\n
1)\u5207\u5206\u5b57\u7b26\u4e32
explode()\u51fd\u6570\u7684\u529f\u80fd\u5c31\u662f\u7528\u6307\u5b9a\u7684\u5206\u9694\u7b26\u628a\u5b57\u7b26\u4e32\u5207\u5206\u6210\u6570\u7ec4,explode()\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:array explode(string $delimiter,string $string[,int $limit])\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d\u6d89\u53ca\u5230\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0b:delimiter:\u6307\u5b9a\u5728\u54ea\u91cc\u5206\u9694\u5b57\u7b26\u4e32,string:\u6307\u5b9a\u8981\u8fdb\u884c\u5206\u5272\u7684\u5b57\u7b26\u4e32,limit:\u6307\u5b9a\u6240\u8fd4\u56de\u7684\u6570\u7ec4\u5143\u7d20\u7684\u6700\u5927\u6570\u76ee,\u6700\u540e\u7684\u5b50\u5757\u5c06\u4f1a\u5305\u542bstring\u7684\u5269\u4f59\u90e8\u5206.
str_split()\u51fd\u6570\u7684\u4f5c\u7528\u662f\u80fd\u591f\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u5206\u5272\u6210\u7b49\u957f\u5ea6\u7684\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32.str_split()\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:array str_split(string $string[,int $split_length=1])\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d\u7684\u53c2\u6570\u8bf4\u660e\u5982\u4e0b:string:\u6307\u5b9a\u8981\u5206\u5272\u7684\u5b57\u7b26\u4e32,split_length:\u6307\u5b9a\u6bcf\u4e2a\u6570\u7ec4\u5143\u7d20\u7684\u957f\u5ea6,\u9ed8\u8ba4\u503c\u4e3a”1″.<\/p>\n
2)\u5408\u5e76\u5b57\u7b26\u4e32
implode()\u51fd\u6570\u7684\u529f\u80fd\u662f\u5c06\u6570\u7ec4\u7684\u5143\u7d20\u8fde\u63a5\u8d77\u6765\u6210\u4e3a\u5b57\u7b26\u4e32,implode()\u51fd\u6570\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b:string implode([string $glue],array $pieces)\u5728\u4e0a\u8ff0\u7684\u8bed\u6cd5\u4e2d\u6d89\u53ca\u5230\u7684\u53c2\u6570\u7684\u8bf4\u660e\u5982\u4e0b:glue()\u6307\u5b9a\u6570\u7ec4\u5143\u7d20\u4e4b\u95f4\u653e\u7f6e\u7684\u5185\u5bb9,\u9ed8\u8ba4\u503c\u4e3a””(\u8868\u793a\u7a7a\u683c\u5b57\u7b26\u4e32)pieces\u6307\u5b9a\u8981\u5408\u5e76\u4e3a\u5b57\u7b26\u4e32\u7684\u6570\u7ec4.\u8c03\u7528implode()\u51fd\u6570\u53ef\u4ee5\u6839\u636e\u53c2\u6570\u6240\u9650\u5236\u7684\u6761\u4ef6\u83b7\u53d6\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32,\u8fbe\u5230\u5408\u5e76\u5b57\u7b26\u4e32\u7684\u76ee\u7684.
join()\u662fimplode()\u51fd\u6570\u7684\u522b\u540d,\u4e24\u4e2a\u51fd\u6570\u7684\u7528\u6cd5\u662f\u5b8c\u5168\u4e00\u6837\u7684,\u9700\u8981\u5f3a\u8c03\u7684\u662f,\u867d\u7136\u53c2\u6570glue\u662f\u53ef\u4ee5\u9009\u7684,\u4f46\u662f\u4e3a\u4e86\u4f7f\u7a0b\u5e8f\u62e5\u6709\u66f4\u597d\u7684\u517c\u5bb9\u6027,\u63a8\u8350\u4f7f\u7528\u4e24\u4e2a\u53c2\u6570.<\/p>\n
\u603b\u7ed3\u4e00\u4e0b\u5b57\u7b26\u4e32\u7684\u76f8\u5173\u64cd\u4f5c\u65b9\u6cd5:<\/p>\n
1)printf()\u51fd\u6570:\u53ef\u4ee5\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u683c\u5f0f\u5316\u64cd\u4f5c
2)sprintf()\u51fd\u6570:\u53ef\u4ee5\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u683c\u5f0f\u5316\u64cd\u4f5c,\u4e0eprintf()\u51fd\u6570\u7684\u533a\u522b\u5c31\u662f\u9700\u8981\u4f7f\u7528echo\u624d\u80fd\u5c06\u683c\u5f0f\u5316\u540e\u7684\u5b57\u7b26\u4e32\u663e\u793a\u8f93\u51fa.
3)nl2br()\u51fd\u6570:\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u6362\u884c\u7b26”
\n“\u8f6c\u6362\u4e3aHTML\u4e2d\u7684”<br\/>”\u540e\u663e\u793a\u51fa\u6765.
4)wordwrap()\u51fd\u6570:\u6307\u5b9a\u4ece\u67d0\u5217\u5b57\u7b26\u8fdb\u884c\u5f3a\u5236\u6362\u884c
5)strtolower()\u51fd\u6570:\u8be5\u51fd\u6570\u5b9e\u73b0\u7684\u529f\u80fd\u662f\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u7684\u5b57\u7b26\u5168\u90e8\u8f6c\u6362\u4e3a\u5c0f\u5199\u5b57\u7b26
6)strtoupper()\u51fd\u6570:\u8be5\u51fd\u6570\u7684\u4f5c\u7528\u5c31\u662f\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u7684\u5b57\u7b26\u5168\u90e8\u8f6c\u6362\u4e3a\u5927\u5199\u7684\u5b57\u7b26
7)ucwords()\u51fd\u6570:\u8be5\u51fd\u6570\u7684\u4f5c\u7528\u5c31\u662f\u5c06\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u7684\u9996\u5b57\u7b26\u5168\u90e8\u8f6c\u6362\u4e3a\u5927\u5199\u5b57\u7b26
8)substr_replace()\u51fd\u6570:\u53ef\u4ee5\u5feb\u901f\u5b8c\u6210\u626b\u63cf\u5e76\u4e14\u7f16\u8f91\u6587\u672c\u5185\u5bb9\u8f83\u591a\u7684\u5b57\u7b26\u4e32\u7684\u529f\u80fd
9)strlen()\u51fd\u6570:\u53ef\u4ee5\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5e76\u4e14\u8fd4\u56de\u8be5\u5b57\u7b26\u4e32\u7684\u957f\u5ea6
10)substr_count()\u51fd\u6570:\u53ef\u4ee5\u786e\u5b9a\u4e00\u4e2a\u5b57\u7b26\u4e32\u5728\u6240\u63d0\u4f9b\u7684\u5b57\u7b26\u4e32\u4e2d\u6709\u591a\u5c11\u4e2a
11)str_word_count()\u51fd\u6570,\u53ef\u4ee5\u786e\u5b9a\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d\u67d0\u4e2a\u5355\u8bcd\u7684\u51fa\u73b0\u6b21\u6570.
12)strstr()\u51fd\u6570,\u53ef\u4ee5\u7528\u6765\u67e5\u627e\u5b50\u5b57\u7b26\u4e32,\u8be5\u51fd\u6570\u7684\u8fd4\u56de\u7ed3\u679c\u4e3a\u5b50\u5b57\u7b26\u4e32\u7b2c\u4e00\u6b21\u51fa\u73b0\u540e\u7684\u6240\u6709\u5185\u5bb9
13)strpos()\u51fd\u6570,\u529f\u80fd\u548cstrstr()\u51fd\u6570\u662f\u7c7b\u4f3c\u7684,\u53ea\u662f\u8fd4\u56de\u7684\u4e0d\u662f\u5b57\u7b26\u4e32,\u800c\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u5728\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e.
14)strcmp()\u51fd\u6570,\u8be5\u51fd\u6570\u7684\u529f\u80fd\u53ef\u4ee5\u7cbe\u786e\u7684\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5927\u5c0f
15)strncmp()\u51fd\u6570,\u53ef\u4ee5\u9009\u62e9\u8981\u6bd4\u8f83\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6(\u5b57\u7b26\u4e2a\u6570)
16)strcasecmp()\u51fd\u6570,\u53ef\u4ee5\u5728\u5ffd\u7565\u5927\u5c0f\u5199\u7684\u65f6\u5019,\u5bf9\u4e24\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884c\u6bd4\u8f83
17)strncasecmp()\u51fd\u6570,\u53ef\u4ee5\u5728\u5ffd\u7565\u5927\u5c0f\u5199\u7684\u524d\u63d0\u4e0b,\u5bf9\u4e24\u4e2a\u5b57\u7b26\u4e32\u65f6\u5019\u8fdb\u884c\u957f\u5ea6\u6216\u8005\u5b57\u7b26\u6570\u76ee\u7684\u6bd4\u8f83.
18)str_repeat()\u51fd\u6570,\u91cd\u590dn\u6b21\u663e\u793a\u4e00\u4e2a\u5b57\u7b26\u6216\u8005\u5b57\u7b26\u4e32\u7684\u529f\u80fd
19)strrev()\u51fd\u6570,\u63d0\u4f9b\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u7ffb\u8f6c\u7684\u64cd\u4f5c
20)explode()\u51fd\u6570,\u63d0\u4f9b\u4e86\u5c06\u67d0\u4e2a\u5b57\u7b26\u4e32\u5207\u5206\u4e3a\u591a\u4e2a\u5b57\u7b26\u4e32\u7684\u529f\u80fd,\u6307\u5b9a\u5206\u9694\u7b26\u5427\u5b57\u7b26\u4e32\u5207\u5206\u6210\u6570\u7ec4.
21)str_split()\u51fd\u6570,\u80fd\u591f\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u5206\u5272\u6210\u7b49\u957f\u5ea6\u7684\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32
22)implode()\u51fd\u6570,\u5c06\u6570\u7ec4\u7684\u5143\u7d20\u8fde\u63a5\u8d77\u6765\u6210\u4e3a\u5b57\u7b26\u4e32
23)join()\u51fd\u6570,\u4f7f\u7528\u65b9\u6cd5\u4e0eimplode()\u51fd\u6570\u662f\u4e00\u6478\u4e00\u6837\u7684,\u5b83\u7684\u4f5c\u7528\u4e5f\u662f\u5c06\u6570\u7ec4\u5143\u7d20\u8fde\u63a5\u8d77\u6765\u6210\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n","protected":false},"excerpt":{"rendered":"
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