(PHP 4 >= 4.0.6, PHP 5, PHP 7)mb_strpos — Find position of first occurrence of string in a stringmb_strpos — 查找字符串在另一个字符串中首次出现的位置
int mb_strpos ( string $haystack , string $needle [, int $offset = 0 [, string $encoding = mb_internal_encoding() ]] )//Finds position of the first occurrence of a string in a string.// 查找 string 在一个 string 中首次出现的位置。//Performs a multi-byte safe strpos() operation based on number of characters. The first character"s position is 0, the second character position is 1, and so on.// 基于字符数执行一个多字节安全的 strpos() 操作。 第一个字符的位置是 0,第二个字符的位置是 1,以此类推。
haystack
needle
offset
encoding
Return Values
Example
<?php/** * Created by PhpStorm. * User: zhangrongxiang * Date: 2018/2/2 * Time: 下午11:16 */$str = "Hello World! Hello PHP";$pos = mb_strpos( $str, "Hello", 0, mb_internal_encoding() );echo $pos . PHP_EOL;//0$pos = mb_strpos( $str, "Hello", 2, mb_internal_encoding() );echo $pos . PHP_EOL;//13function mb_str_replace( $haystack, $search, $replace, $offset = 0, $encoding = "auto" ) { $len_sch = mb_strlen( $search, $encoding ); $len_rep = mb_strlen( $replace, $encoding ); while ( ( $offset = mb_strpos( $haystack, $search, $offset, $encoding ) ) !== false ) { $haystack = mb_substr( $haystack, 0, $offset, $encoding ) . $replace . mb_substr( $haystack, $offset + $len_sch, $le = mb_strlen( $haystack ) - mb_strlen( $search ) + mb_strlen( $replace ), $encoding ); //echo $le.PHP_EOL; $offset = $offset + $len_rep; if ( $offset > mb_strlen( $haystack, $encoding ) ) { break; } } return $haystack;}$replace = mb_str_replace( "hello world !hello world !hello world !hello world !", "hello", "hi" );echo $replace . PHP_EOL; //hi world !hi world !hi world !hi world !//hi PHP !hi PHP !hi PHP !hi PHP !echo mb_str_replace( $replace, "world", "PHP" ) . PHP_EOL;echo mb_str_replace( $replace, " ", "-" ) . PHP_EOL;//PHP是世界上最好的语言😂😂😂😂😂😂echo mb_str_replace( "PHP是世界上最好的语言😄😄😄😄😄😄", "😄", "😂", 0, mb_internal_encoding() ) . PHP_EOL;echo mb_str_replace( "112233445566", "22", "00" ) . PHP_EOL;//110033445566echo mb_str_replace( "😄😄😄😄", "😄", "😫1", 2, mb_internal_encoding() ) . PHP_EOL;echo mb_str_replace( "1111", "111", "0", 1 ) . PHP_EOL;//10echo mb_strlen( "😄😄😄😄" ) . PHP_EOL;//4//代码开发代码echo mb_str_replace( "软件开发软件", "软件", "代码" ,0,mb_internal_encoding()) . PHP_EOL;//代码开发 //todo??echo mb_str_replace( "软件开发软件", "软件", "代码" ) . PHP_EOL;