The most common way to convert arrays and strings in PHP is to use the explode() and implode() functions. Today I saw a friend asked such a question. Let me sort it out and share it with you. .
Let’s take a look at these two functions
implode function:
Use function implode to convert array to string
explode function:
Use explode function to convert string into array
Example 1.
Today I saw in the PHP forum that a friend posted a post asking PHP how to convert a string into an array; as a PHP programmer, Xinyi’s first reaction was to think of the two functions explode() and implode(). . Shinichi also uses the function inside to convert it into an array.
con[1]=28&selt[1]=1&con[2]=29&selt[2]=4&con[3]=26&selt[3]=4
&con[4]=30&selt[4]=2&con[5]=4&selt[5]=1&con[6]=11&con[7]=12
The above is the string that netizens need to convert into a PHP array; below is the PHP conversion code provided by Xinyi
| The code is as follows |
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| 代码如下 |
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$str = 'con[1]=28&selt[1]=1&con[2]=29&selt[2]=4&con[3]=26&selt[3]=4&con[4]=30&selt[4]=2&con[5]=4&selt[5]=1&con[6]=11&con[7]=12';
$arr = explode('&',$str);
$arr2 = array();
foreach($arr as $k=>$v){
$arr = explode('=',$v);
$arr2[$k] = $arr[1];
}
print_r($arr2);
?>
//输出
Array
(
[0] => 28
[1] => 1
[2] => 29
[3] => 4
[4] => 26
[5] => 4
[6] => 30
[7] => 2
[8] => 4
[9] => 1
[10] => 11
[11] => 12
)
//第二个
$str = 'con[1]=28&selt[1]=1&con[2]=29&selt[2]=4&con[3]=26&selt[3]=4&con[4]=30&selt[4]=2&con[5]=4&selt[5]=1&con[6]=11&con[7]=12';
$arr = explode('&',$str);
$arr2 = array();
foreach($arr as $k=>$v){
$arr = explode('=',$v);
$arr2[$arr[0]] = $arr[1];
}
print_r($arr2);
?>
//输出
Array
(
[con[1]] => 28
[selt[1]] => 1
[con[2]] => 29
[selt[2]] => 4
[con[3]] => 26
[selt[3]] => 4
[con[4]] => 30
[selt[4]] => 2
[con[5]] => 4
[selt[5]] => 1
[con[6]] => 11
[con[7]] => 12
)
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$str = 'con[1]=28&selt[1]=1&con[2]=29&selt[2]=4&con[3]=26&selt[3]=4&con[4]=30&selt[4]=2&con[5]=4&selt [5]=1&con[6]=11&con[7]=12';
$arr = explode('&',$str);
$arr2 = array();
foreach($arr as $k=>$v){
| 代码如下 |
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//将多维数组中所有的数值转换成字符串????》最多支持三维数组
function implodex( $glue, $array, $separator='' ) {
if ( ! is_array( $array ) ) return $array;
$string = array();
$count = 0;
foreach ( $array as $key => $val ) {
if ( is_array( $val ) )
$val = implode( $glue, $val );
if($count == 0){
$string[] = "{$val}";
}else{
$string[] = "{$glue}{$val}";
}
}
if(empty($separator))$separator = $glue;
return implode( $separator, $string );
}
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$arr = explode('=',$v);
$arr2[$k] = $arr[1];
}
print_r($arr2);
?>
//Output
Array
(
[0] => 28
[1] => 1
[2] => 29
[3] => 4
[4] => 26
[5] => 4
[6] => 30
[7] => 2
[8] => 4
[9] => 1
[10] => 11
[11] => 12
)
//Second
$str = 'con[1]=28&selt[1]=1&con[2]=29&selt[2]=4&con[3]=26&selt[3]=4&con[4]=30&selt[4]=2&con[5]=4&selt [5]=1&con[6]=11&con[7]=12'; <🎜>
$arr = explode('&',$str); <🎜>
$arr2 = array(); <🎜>
foreach($arr as $k=>$v){
$arr = explode('=',$v);
$arr2[$arr[0]] = $arr[1];
}
print_r($arr2);
?>
//Output
Array
(
[con[1]] => 28
[selt[1]] => 1
[con[2]] => 29
[selt[2]] => 4
[con[3]] => 26
[selt[3]] => 4
[con[4]] => 30
[selt[4]] => 2
[con[5]] => 4
[selt[5]] => 1
[con[6]] => 11
[con[7]] => 12
)
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Example 2.
The above only supports one-dimensional data. What if it is two-dimensional or three-dimensional data
| The code is as follows |
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//Convert all values in the multi-dimensional array into strings????》Supports up to three-dimensional arrays
function implodex( $glue, $array, $separator='' ) {
if ( ! is_array( $array ) ) return $array;
$string = array();
$count = 0;
foreach ( $array as $key => $val ) {
if ( is_array( $val ) )
$val = implode( $glue, $val );
if($count == 0){
$string[] = "{$val}";
}else{
$string[] = "{$glue}{$val}";
}
}
if(empty($separator))$separator = $glue;
return implode( $separator, $string );
}
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Example 3.
Convert arrays into strings for storage and retrieve strings into arrays (serialize & unserialize)
Look at an example below:
The code is as follows
| 代码如下 |
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// $Id: test3.php,v 1.0 2011-6-7 goba Exp $
/**
* 测试PHP存储数值
*
* @author Lok
*/
$config = array (
'host' => 'localhost',
'user_name' => 'root',
'password' => '',
'db_name' => 'ecshop',
'charset' => 'utf8',
'remark' => array ('note' => '要注意密码的安全', 'author' => 'Lok')
);
$str = serialize($config);
$arr = unserialize($str);
echo '--------str--------
';
var_dump($str);
echo '
-------arr----------
';
var_dump($arr)
?>结果：
--------str--------
string(221) "a:6:{s:4:"host";s:9:"localhost";
s:9:"user_name";s:4:"root";
s:8:"password";s:0:"";
s:7:"db_name";s:8:"ecshop";
s:7:"charset";s:4:"utf8";
s:6:"remark";a:2:{s:4:"note";s:24:"要注意密码的安全";
s:6:"author";s:3:"Lok";}}"
-------arr----------
array(6) { ["host"]=> string(9) "localhost"
["user_name"]=> string(4) "root"
["password"]=> string(0) ""
["db_name"]=> string(8) "emoishop"
["charset"]=> string(4) "utf8"
["remark"]=> array(2) { ["note"]=> string(24) "要注意密码的安全"
["author"]=> string(3) "Lok" } }
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// $Id: test3.php,v 1.0 2011-6-7 goba Exp $
/**
* Test PHP storage value
*
* @author Lok
*/
$config = array (
'host' => 'localhost',
'user_name' => 'root',
'password' => '',
'db_name' => 'ecshop',
'charset' => 'utf8',
'remark' => array ('note' => 'Pay attention to the security of your password', 'author' => 'Lok')
);
$str = serialize($config);
$arr = unserialize($str);
echo '--------str--------
';
var_dump($str);
echo '
-------arr----------
';
var_dump($arr)
?>Result:
--------str--------
string(221) "a:6:{s:4:"host";s:9:"localhost";
s:9:"user_name";s:4:"root";
s:8:"password";s:0:"";
s:7:"db_name";s:8:"ecshop";
s:7:"charset";s:4:"utf8";
s:6:"remark";a:2:{s:4:"note";s:24:"Pay attention to the security of your password";
s:6:"author";s:3:"Lok";}}"
-------arr----------
array(6) { ["host"]=> string(9) "localhost"
["user_name"]=> string(4) "root"
["password"]=> string(0) ""
["db_name"]=> string(8) "emoishop"
["charset"]=> string(4) "utf8"
["remark"]=> array(2) { ["note"]=> string(24) "Pay attention to the security of your password"
["author"]=> string(3) "Lok" } }
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