Convert strings to arrays in php using explode(),implode()_PHP tutorial

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 复制代码 $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 ) $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 复制代码 //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 ); }            $arr = explode('=',$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 )

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 ); }

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 复制代码 // $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 $

'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" } } http://www.bkjia.com/PHPjc/633057.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/633057.htmlTechArticleThe most common way to convert arrays and strings in PHP is to use the explode() and implode() functions. Converted, today I saw a friend asked a question like this, let me sort it out...