PHP learning path 6 (php and regular expressions ). [Php] does htmlheadtitle match titleheadbody? Php $ findlove; defines the variable $ resultpreg_match ($ find, Iloveyou, xiaohei!) to be searched !); The first parameter is [php].
Regular expressions and style matching
$ Find = "love"; // defines the variable to be searched
$ Result = preg_match ("/$ find/", "I love you, xiaohei! "); // The first parameter is
// Variable. The second parameter is the search string.
// Search for "you" with leading and trailing spaces. false is returned.
@ $ Result1 = preg_match ("\ byou \ B/", "I love you, xiaohei! ");
If ($ result ){
Echo "matched!
";
} Else {
Echo "matching failed!
";
}
If ($ result1 ){
Echo "\ byou \ B/". "matching successful!
";
} Else {
Echo "\ byou \ B/". "matching failed!
";
}
?>
/* ^ Metacharacters are called the first end of a line .. Matches the style found from the start of the string.
* Judge whether there is Wang changchao in the award list ("Li Xingle Wang changchao and Xiao Hei"). if Wang changchao and Li Xingle are the first winners
**/
$ String = "Li Xingle Wang changchao xiao ";
$ Name1 = "Wang changchao ";
$ Name2 = "Li Xingle ";
If (ereg ("Wang changchao", $ string) {// determine whether there is Wang changchao
Echo "Wang changchao!
";
}
If (ereg ("^ Li Xingle", $ string) {// determines whether the first line is Li Xingle
Echo 'Li Xingle is the first
';
}
If (ereg ("^ Wang changchao", $ string )){
Echo "Wang changchao is the first
";
}
If (ereg (" $", $ string) {// determines whether the end of a row is a
Echo "Xiao Hei is the last
";
}
?>
// Determine the email format
// Metacharacters + are used to match the previous subexpression one or more times. {2} indicates that the matching times are fed twice. {2, 4} repeated 2-4 times
$ Myemail = "lixingle123@qq.com ";
If (ereg ("([0-9a-zA-Z] +) ([@]) ([0-9a-zA-Z] +) ([.]) ([0-9a-zA-Z] {2, 4}) ", $ myemail )){
Echo $ myemail. "The format is correct.
";
} Else {
The echo $ myemail. "format is incorrect. please enter it again!
";
}
?>
// Match character format
// Determine whether the date format is in YYYY-MM-DD format
$ Mydate = "2012-11-26 ";
If (ereg ("([0-9] {4}) (-) ([0-9] {2 })(-) ([0-9] {2}) ", $ mydate, $ regs )){
Echo $ regs [1]. "$ regs [3] $ regs [5]
";
} Else {
Echo "time format error!
";
}
?>
/* PHP supports regular expressions in the Perl style,
* Style matching functions:
* Int preg_match (string $ pattern, string $ subject [, array $ matches [, int flages]);
* Int preg_match_all (string $ pattern, string $ subject [, array $ matches [, int flages]);
* Preg_match () and preg_match_all () are similar in usage, but the latter matches the entire string instead of the first one for the license and returns the number of styles found.
*
**/
$ String = "I am studing PHP, PHP is so easy. PHP ";
$ Result = preg_match_all ("/PHP/I", $ string, $ matches, PREG_OFFSET_CAPTURE );
If ($ result = true ){
Echo "$ result PHP was found.
";
Print_r ($ matches );
Echo"
";
} Else {
Echo "PHP was not found.
";
Print_r ($ matches );
Echo"
";
}
?>
Http://www.bkjia.com/PHPjc/477892.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/477892.htmlTechArticle[php] html head title regular expression and style match/title/head body? Php $ find = love; // defines the variable $ result = preg_match (/$ find/, I love you, xiaohei!) to be searched !); // The first parameter is...
