explode() 函數(shù)把字符串分割為數(shù)組；

implode() 函數(shù)把數(shù)組元素組合為一個(gè)字符串。

explode

定義 array explode ( string $delimiter , string $string [, int $limit = PHP_INT_MAX ] )

參數(shù)： limit 限制結(jié)果的個(gè)數(shù)。

$str = "hi, jason, world"; print_r(explode(',', $str)); print_r(explode(',', $str, 2));

結(jié)果：

Array ( [0] => hi [1] => jason [2] => world ) Array ( [0] => hi [1] => jason, world )

練習(xí)題例子：定義一個(gè)字符串a(chǎn),計(jì)算出下劃線后面的值相加得多少，使用分割字符串函數(shù)。

 $a='331612_1,331495_1,331461_2,331559_1,333080_1,333555_1,331448_1,331618_1,333388_1,33  3408_1,327937_1,331615_1,331499_1';  $arr=explode(',',$a);  $sum=0;  foreach ($arr as $value) {      $ary=explode('_', $value);      $sum+=$ary[1];  }  print_r($sum);

implode

定義 string implode ( string $glue , array $pieces )

<?php $array  = array( 'lastname' ,  'email' ,  'phone' );  $comma_separated  =  implode ( "," ,  $array ); echo  $comma_separated ;  // lastname,email,phone