<?php

//*

//* 正则

//*

//$str = ‘zhang’;

//$pg = ‘/^abc/’;

//

//preg_match( $pg, $str, $arr );

//

//print_r( $arr );

//$pg = ‘/\bzhang\b/’;

//

//preg_match( $pg, $str, $arr );

//

//print_r( $arr );

//$str = ‘TM’;

//$pg = ‘/[Tt][Mm]/’;

//

//preg_match( $pg, $str, $arr );

//

//print_r( $arr );

//$str = ‘ZhangRong’;//ZhangRong

//

//$pg = ‘/(Zhang|zhang)Rong/’;

//

//preg_match( $pg, $str, $arr );

//

//print_r( $arr );

//$str = ‘azhang’;

//$pg = ‘/[a-cA-Z]/’;

//

//preg_match( $pg, $str, $arr );

//

//print_r( $arr );

//$pg = ‘/^z.{2}n.+n$/’;

//

//preg_match( $pg, $str, $arr );

//

//print_r( $arr );

//转义符

//$str = ‘127.0.0.1’;

////$str = ‘127a0b0c1’;

//$pg = ‘/[0-9]{3}(\.[0-9]{1,3}){3}/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//$str = ‘abc\dfg’;

//$pg = ‘/abc\\\\dfg/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//预定义字符集

//$str = ‘abc3dfg’;

//$pg = ‘/abc\ddfg/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//$str = ‘abc def’;

//$pg = ‘/abc\sdef/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

////$str = ‘azC_d8f’;

////$pg = ‘/[\w]{7}/’;

//$str = ‘&*%$#’;

//$pg = ‘/[\W]{1,}/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//$str = ‘abczhron’;

//$pg = ‘/(abc|cdf|123)zh(ang|ron|uan)/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//$str = ‘ititit’;

//$pg = ‘/(it)\1\1/’;

//$str = ‘aAaA’;

//$pg = ‘/([a-z])([A-Z])\1\2/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//$str = ‘aAaA’;

//$pg = ‘/(?P<fir>[a-z])(?P<sec>[A-Z])(?P=fir)(?P=sec)/’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//模式修饰符

//$str = ‘aAaA’;

//$pg = ‘/A{4}/s’;

//preg_match( $pg, $str, $arr );

//print_r( $arr );

//* preg_grep

//$arr = array( ‘abc’, ‘ace’, ‘xxx’, ‘yyy’, ‘aee’ );

//$pg = ‘/^[^a].*/’;

//$arr = preg_grep( $pg, $arr );

//print_r( $arr );

//* preg_match、preg_match_all

//$str = ‘abcdeabcdefffxxxxyyy’;

//$pg = ‘/c/’;

//preg_match_all( $pg, $str, $arr );

//print_r( $arr );

//* preg_quote 转义

//$str = ‘abcdeabcdefffxxxxyyy’;

//$pg = ‘x’;

//$str = preg_quote( $str, $pg );

//print_r( $str );

//* preg_replace 替换

//$str = ‘abcdeabcdefffxxxxyyy’;

//$pg = ‘/x/’;

//$str = preg_replace( $pg, ‘A’, $str, 3 );

//print_r( $str );

//* preg_replace 替换

//$str = ‘abcdeabcdefffxxxxyyy’;

//function pg($pg){

// return $pg[1] . ‘&’;

//}

//$pg = ‘/(x)/’;

//$str = preg_replace_callback( $pg, ‘pg’, $str );

//print_r( $str );

//* preg_split 分割字符串

$str = ‘abc1234cdefffxcxxcyy’;

$pg = ‘/c/’;

$str = preg_split( $pg, $str );

print_r( $str );