mb_strpos
- (PHP 4 >= 4.0.6, PHP 5, PHP 7)
- mb_strpos — Find position of first occurrence of string in a string
- mb_strpos — 查找字符串在另一個字符串中首次出現(xiàn)的位置
Description
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 在一個 string 中首次出現(xiàn)的位置缨伊。
//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.
// 基于字符數(shù)執(zhí)行一個多字節(jié)安全的 strpos() 操作。 第一個字符的位置是 0,第二個字符的位置是 1沐鼠,以此類推旨剥。
Parameters
haystack
- The string being checked.
- 要被檢查的 string芒涡。
needle
- The string to find in haystack. In contrast with strpos(), numeric values are not applied as the ordinal value of a character.
- 在 haystack 中查找這個字符串泽篮。 和 strpos() 不同的是坊秸,數(shù)字的值不會被當做字符的順序值唐断。
offset
- The search offset. If it is not specified, 0 is used. A negative offset counts from the end of the string.
- 搜索位置的偏移选脊。如果沒有提供該參數(shù),將會使用 0脸甘。負數(shù)的 offset 會從字符串尾部開始統(tǒng)計恳啥。
encoding
- The encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.
- encoding 參數(shù)為字符編碼。如果省略丹诀,則使用內(nèi)部字符編碼角寸。
Return Values
- Returns the numeric position of the first occurrence of needle in the haystack string. If needle is not found, it returns FALSE.
- 返回 string 的 haystack 中 needle 首次出現(xiàn)位置的數(shù)值菩混。 如果沒有找到 needle,它將返回 FALSE扁藕。
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;//13
function 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是世界上最好的語言????????????
echo mb_str_replace( "PHP是世界上最好的語言????????????", '??', '??', 0, mb_internal_encoding() ) . PHP_EOL;
echo mb_str_replace( "112233445566", '22', '00' ) . PHP_EOL;//110033445566
echo mb_str_replace( '????????', '??', '??1', 2, mb_internal_encoding() ) . PHP_EOL;
echo mb_str_replace( '1111', '111', '0', 1 ) . PHP_EOL;//10
echo mb_strlen( '????????' ) . PHP_EOL;//4
//代碼開發(fā)代碼
echo mb_str_replace( '軟件開發(fā)軟件', '軟件', '代碼' ,0,mb_internal_encoding()) . PHP_EOL;
//代碼開發(fā) //todo??
echo mb_str_replace( '軟件開發(fā)軟件', '軟件', '代碼' ) . PHP_EOL;
文章參考
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