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练习正则函数和字符串函数-19年10月17日

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<?php
header("Content-Type: text/html;charset=utf-8");

//*普通字符
$pattem = '/[0-9]/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f 231 fasdf1sd32f1315642315131351321534132 fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';



//*非打印字符
$pattem = '/\n/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

echo '<hr>';

//*自定义字符
$pattem = '/[a-z]/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';



//*二、元字符   .代表换行符之外的全部字符
$pattem = '/32./';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*二、元字符匹配两个或多个内容
$pattem = '/32|41/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';

//*二、元字符取反取括号内之外的书，排除括号里面的
$pattem = '/[^1234]/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';




//*二、元字符从第一个字符开始匹配，必须是^符号后面一模一样的内容
$pattem = '/^[a-z]/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

echo '<hr>';

//*二、元字符从最后一个字符开始匹配
$pattem = '/[0-9a-zA-Z]$/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

echo '<hr>';

//*三、量词（限定符）n词等于3次
$pattem = '/[0-9]{3}/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*三、量词（限定符）不少于1次
$pattem = '/[0-9]{1,}/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*三、量词（限定符）大于1个小于3个
$pattem = '/[0-9]{1,3}/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';



//*三、量词（限定符匹配1次或多次
$pattem = '/[0-9]+/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

echo '<hr>';

//*三、量词（限定符）匹配连续的0次或1次
$pattem = '/[0-9]?/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';



//*四、预定义字符匹配任意一个十进制数
$pattem = '/\d/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*四、预定义字符匹配出十进制以外的数
$pattem = '/\D/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';




//*四、预定义字符   匹配任意一个字母、数字、下划线
$pattem = '/\w/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*四、预定义字符     匹配除任字母、数字、下划线之外的
$pattem = '/\W/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*四、预定义字符   空白字符
$pattem = '/\s/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*四、预定义字符除空白字符以外的
$pattem = '/\S/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';

//*四、预定义字符   边界就是中间有没有空格分开的数
$pattem = '/\b/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*四、预定义字符除边界以外的
$pattem = '/\B/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w23544253442132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';





//*五、预定义字符匹配连续的0次或1次
$pattem = '/\?/';

$str = 'd1f3w35fw4fw4efw4ef5w4efw4efwefwfwemhgekrthege3gergregdasfdqef2w235442534+ ? * + ?$42132f
231 fasdf1sd32f1315642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

echo '<hr>';

//*六、分组符
$pattem = '/(对对对|阿萨德)|([0-9])/';

$str = 'd1f3w35fw4fsad阿萨德w4efw4ef5对对对w4efw4efwefwfwemhgekrthe对对对ge3gergregdasfdqef2w235442534+ ? * + ?$42132f
231 fasdf1sd32f1315对对对642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*叮叮咚咚fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*七、修正符   加U取消贪婪模式   默认是贪婪模式   正则表达式有贪婪模式和懒惰模式
$pattem = '/ge.*/U';

$str = 'd1f3w35fw4fsad阿萨德w4efw4ef5对对对w4efw4efwefwfwemhgekrthe对对对ge3gergregdasfdqef2w235442534+ ? * + ?$42132f
231 fasdf1sd32f1315对对对642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*叮叮咚咚fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';


//*七、修正符   i忽略大小写
$pattem = '/ge*/i';

$str = 'd1f3w35fw4fsad阿萨德w4efw4ef5对对对w4efw4efwefwfwemhgekrthe对对对ge3gergregdasfdqef2w235442534+ ? * + ?$42132f
231 fasdf1sd32f1315对对对642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*叮叮咚咚fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';



   //*七、修正符   s忽略换行符
$pattem = '/fe*/s';

$str = 'd1f3w35fw4fsad阿萨德w4efw4ef5对对对w4efw4efwefwfwemhgekrthe对对对ge3gergregdasfdqef2w235442534+ ? * + ?$42132f
231 fasdf1sd32f1315对对对642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*叮叮咚咚fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

  echo '<hr>';



   //*七、修正符 x 忽略空白
$pattem = '/ 5
    1
    3/x';

$str = 'd1f3w35fw4fsad阿萨德w4efw4ef5对对对w4efw4efwefwfwemhgekrthe对对对ge3gergregdasfdqef2w235442534+ ? * + ?$42132f
231 fasdf1sd32f1315对对对642315131351321534132
fwqe3frw1fw1fw2f1wfdfwfwf*叮叮咚咚fe1g23e1g3eg1ergwefwefw';

$a = preg_match_all($pattem,$str,$res);
echo print_r($a,true);
echo '<hr>';
echo print_r($res,true) ;

echo '<hr>';

?>

批改状态：合格

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