php-array tagged requests and articles
Categorized request examples and articles tagged with [php-array] keyword How do I convert JSON to PHP array?
To convert a JSON data string to a PHP array, you can use the json_decode($json) function. The json_decode() function accepts the JSON string as the first parameter and a few additional parameters to control the process of converting JSON to a PHP array. If the JSON cannot be converted to an array or the data nesting depth exceeds the recursion limit, the converting function will return NULL. In this JSON Convert to PHP Array example, we use the json_decode() function to convert JSON string to a PHP array. Click Execute to run the JSON to PHP Array Example online and see the result.
How do I convert PHP Array to JSON?
To convert a PHP array to JSON data string, you can use the json_encode($value, $flags, $depth) function. The json_encode() function takes a PHP array as input and returns a JSON string representation. You can customize the conversion of a PHP array to JSON using additional parameters for the json_encode() function, such as "JSON_PRETTY_PRINT", for human-readable formatting and JSON output behavior. In this PHP Array to JSON example, we use the json_encode() function to convert a PHP array to a JSON string with no additional parameters. Below, you'll find more examples demonstrating additional options for converting a PHP array to a JSON string. Click Execute to run the Convert PHP Array to JSON String Example online and see the result.
How do I print an array in PHP?
To print or echo an array in PHP, you can use the print_r($variable, $return) or var_dump($variable1, $variable2, ...) functions. The print_r() function prints information about the passed variable in human-readable form. The first parameter is the "variable" we want to get information about. The second optional parameter determines whether the function should print or return the result. The default value is "False". If the parameter value is "True", the function will return the value as if it were printed to the output stream. The var_dump() function takes one or more arguments and displays structured information about the variables, including the type and value. In this Print PHP Array example, we use the print_r() function to print information about a given array. Below you can see more examples of PHP array printouts with a detailed description of each method. Click Execute to run the PHP Print Array Example online and see the result.
How to check if an element exists in a PHP array?
To check if an element exists in a PHP array, you can use the in_array($search, $array, $mode) function. The $search parameter specifies the element or value to search in the specified array and can be of a mixed type (string, integer, or other types). If the parameter is a string type, the search will be case-sensitive. The $array parameter specifies the array to search for the value. The $mode parameter is an optional boolean parameter that specifies the search mode. If the parameter is set to TRUE, then the in_array() function will search for a value with the same value type as specified in the "search" parameter. The default value for the "mode" parameter is FALSE. In this PHP Search In Array example, we use the in_array() function to check whether the given value exists in the array. Click Execute to run the PHP In Array Example online and see the result.
How do I convert an array to a string in PHP?
To convert an array to a string in PHP you can use implode($separator, $array), json_encode($array) or serialize($array) functions. The implode() function allows you to concatenate array elements into a single string. To do this, pass an array, and a delimiter to the implode(); the separator will be inserted between the array values. The json_encode() function converts an array to a JSON string. It takes an array as input and returns a JSON array representation. The serialize() function takes an array and converts it to a string. This function is handy if you want to store something in the database and retrieve it for later use. In this Convert PHP Array to String example, we use the implode() function to convert an array to a string. Below you can see more examples of converting a PHP array to a string with a detailed description of each method. Click Execute to run the PHP Array to String Example online and see the result.
How to push an element into a PHP array?
To add elements to a PHP array, you can use the array_push($array, $val1, $val2, ....) function. The array_push() function adds one or more elements to the end of the array and automatically increases the array's length. The $array parameter refers to the original array to which elements are added. The function will raise an exception if the first argument is not an array. The parameters $val1 and $val2 are the elements we want to push into the array. In this PHP Push Elements to Array example, we add elements to an array using the array_push() function. Click Execute to run the PHP Array Push Example online and see the result.
How to create a new array using PHP array_map()?
To create a new array from an existing PHP array, you can use the array_map($callback, $array1, $array2, ...) function. The array_map() function iterates over all the elements of an array and returns a new array containing the results of applying the given $callback function to the array elements. The array_map() function does not change the original array but creates a new one. You can pass several arrays to the array_map() function. The number of parameters the $callback function takes must match the number of arrays passed to the array_map(). The first parameter can be a string representing the function name, an array containing an object and a method name, or an anonymous function. The second parameter specifies the array to process. In this PHP Array Map example, we use the array_map() function to loop over an array and return a new array, where a callback function has been applied to each element in the array. Click Execute to run the PHP Array Map Example online and see the result.
How to get the length of an array in PHP?
To get the array's length in PHP, you can use the count() and sizeof() functions that return the number of items in the array. Function sizeof() is the alias of the count() function. The count() function returns 0 for a variable initialized by an empty array. In this PHP Array Length example, we obtain the array's length using the count() function. Click Execute to run the PHP Array Length Example online and see the result.
How do I sort an array in PHP?
To sort the elements of a PHP array, you can use one of the following PHP functions: sort(), rsort(), asort(), ksort(), arsort(), krsort(). Arrays can be sorted alphabetically or numerically, in ascending or descending order. When sorting an associative array in PHP, array keys retain their correlation with the associated values. The sort() function sorts an array in ascending order, while rsort() sorts it in descending order. The asort() function sorts an associative array in ascending order, and the arsort() sorts in descending order. The ksort() function sorts associative arrays in ascending order by keys, and the krsort() sorts in descending order. In this PHP Sort Array example, we use the sort() function to sort the elements of an array in numerical order. Below you can see more examples of sorting PHP array elements with a detailed description of each method. Click Execute to run the PHP Sort Array Example online and see the result.
How to assign multiple variables at once in PHP using list()?
The list() construct in PHP assigns multiple variables at once using an array. This is especially useful when splitting an array into individual variables. As of PHP 7.1, the list() supports square bracket [] syntax. For list() to work correctly, the number of variables you are trying to assign must match the number of elements in the array. The remaining variables will be ignored if there are fewer variables than array elements. The additional variables will be set to NULL if there are more variables than array elements. The list() construct only supports indexed arrays and does not work with associative arrays. For associative arrays, you need to extract the values first. In this PHP List Example, we assign multiple variables at once using the list() construct. Click Execute to run the PHP List Example online and see the result.
How to concatenate array elements in PHP using implode() function?
PHP's built-in implode() function concatenates array elements into a string using a specified delimiter. It returns a string resulting from joining the array elements separated by the provided string. To use the implode() function, you should pass two arguments: the string you want to use as the delimiter and the array you want to concatenate. If you pass only one argument (an array), PHP will automatically use the empty string as the delimiter. The implode() function does not change the original array. In this PHP Implode Example, we concatenate array elements using a comma as a separator. Click Execute to run the PHP Implode Example online and see the result.
How to iterate an array in PHP using foreach?PHP Code Snippet
The foreach loop statement in PHP offers an elegant way to iterate through arrays. PHP supports two syntaxes for iterating over associative and indexed arrays. Use the foreach($array as $value) syntax for indexed arrays and the foreach($array as $key => $value) syntax for associative arrays. In this PHP Foreach Example, we iterate over an array and print all its values. Click Execute to run the PHP Foreach Example online and see results.
To convert a JSON data string to a PHP array, you can use the json_decode($json) function. The json_decode() function accepts the JSON string as the first parameter and a few additional parameters to control the process of converting JSON to a PHP array. If the JSON cannot be converted to an array or the data nesting depth exceeds the recursion limit, the converting function will return NULL. In this JSON Convert to PHP Array example, we use the json_decode() function to convert JSON string to a PHP array. Click Execute to run the JSON to PHP Array Example online and see the result.
How do I convert PHP Array to JSON?
To convert a PHP array to JSON data string, you can use the json_encode($value, $flags, $depth) function. The json_encode() function takes a PHP array as input and returns a JSON string representation. You can customize the conversion of a PHP array to JSON using additional parameters for the json_encode() function, such as "JSON_PRETTY_PRINT", for human-readable formatting and JSON output behavior. In this PHP Array to JSON example, we use the json_encode() function to convert a PHP array to a JSON string with no additional parameters. Below, you'll find more examples demonstrating additional options for converting a PHP array to a JSON string. Click Execute to run the Convert PHP Array to JSON String Example online and see the result.
How do I print an array in PHP?
To print or echo an array in PHP, you can use the print_r($variable, $return) or var_dump($variable1, $variable2, ...) functions. The print_r() function prints information about the passed variable in human-readable form. The first parameter is the "variable" we want to get information about. The second optional parameter determines whether the function should print or return the result. The default value is "False". If the parameter value is "True", the function will return the value as if it were printed to the output stream. The var_dump() function takes one or more arguments and displays structured information about the variables, including the type and value. In this Print PHP Array example, we use the print_r() function to print information about a given array. Below you can see more examples of PHP array printouts with a detailed description of each method. Click Execute to run the PHP Print Array Example online and see the result.
How to check if an element exists in a PHP array?
To check if an element exists in a PHP array, you can use the in_array($search, $array, $mode) function. The $search parameter specifies the element or value to search in the specified array and can be of a mixed type (string, integer, or other types). If the parameter is a string type, the search will be case-sensitive. The $array parameter specifies the array to search for the value. The $mode parameter is an optional boolean parameter that specifies the search mode. If the parameter is set to TRUE, then the in_array() function will search for a value with the same value type as specified in the "search" parameter. The default value for the "mode" parameter is FALSE. In this PHP Search In Array example, we use the in_array() function to check whether the given value exists in the array. Click Execute to run the PHP In Array Example online and see the result.
How do I convert an array to a string in PHP?
To convert an array to a string in PHP you can use implode($separator, $array), json_encode($array) or serialize($array) functions. The implode() function allows you to concatenate array elements into a single string. To do this, pass an array, and a delimiter to the implode(); the separator will be inserted between the array values. The json_encode() function converts an array to a JSON string. It takes an array as input and returns a JSON array representation. The serialize() function takes an array and converts it to a string. This function is handy if you want to store something in the database and retrieve it for later use. In this Convert PHP Array to String example, we use the implode() function to convert an array to a string. Below you can see more examples of converting a PHP array to a string with a detailed description of each method. Click Execute to run the PHP Array to String Example online and see the result.
How to push an element into a PHP array?
To add elements to a PHP array, you can use the array_push($array, $val1, $val2, ....) function. The array_push() function adds one or more elements to the end of the array and automatically increases the array's length. The $array parameter refers to the original array to which elements are added. The function will raise an exception if the first argument is not an array. The parameters $val1 and $val2 are the elements we want to push into the array. In this PHP Push Elements to Array example, we add elements to an array using the array_push() function. Click Execute to run the PHP Array Push Example online and see the result.
How to create a new array using PHP array_map()?
To create a new array from an existing PHP array, you can use the array_map($callback, $array1, $array2, ...) function. The array_map() function iterates over all the elements of an array and returns a new array containing the results of applying the given $callback function to the array elements. The array_map() function does not change the original array but creates a new one. You can pass several arrays to the array_map() function. The number of parameters the $callback function takes must match the number of arrays passed to the array_map(). The first parameter can be a string representing the function name, an array containing an object and a method name, or an anonymous function. The second parameter specifies the array to process. In this PHP Array Map example, we use the array_map() function to loop over an array and return a new array, where a callback function has been applied to each element in the array. Click Execute to run the PHP Array Map Example online and see the result.
How to get the length of an array in PHP?
To get the array's length in PHP, you can use the count() and sizeof() functions that return the number of items in the array. Function sizeof() is the alias of the count() function. The count() function returns 0 for a variable initialized by an empty array. In this PHP Array Length example, we obtain the array's length using the count() function. Click Execute to run the PHP Array Length Example online and see the result.
How do I sort an array in PHP?
To sort the elements of a PHP array, you can use one of the following PHP functions: sort(), rsort(), asort(), ksort(), arsort(), krsort(). Arrays can be sorted alphabetically or numerically, in ascending or descending order. When sorting an associative array in PHP, array keys retain their correlation with the associated values. The sort() function sorts an array in ascending order, while rsort() sorts it in descending order. The asort() function sorts an associative array in ascending order, and the arsort() sorts in descending order. The ksort() function sorts associative arrays in ascending order by keys, and the krsort() sorts in descending order. In this PHP Sort Array example, we use the sort() function to sort the elements of an array in numerical order. Below you can see more examples of sorting PHP array elements with a detailed description of each method. Click Execute to run the PHP Sort Array Example online and see the result.
How to assign multiple variables at once in PHP using list()?
The list() construct in PHP assigns multiple variables at once using an array. This is especially useful when splitting an array into individual variables. As of PHP 7.1, the list() supports square bracket [] syntax. For list() to work correctly, the number of variables you are trying to assign must match the number of elements in the array. The remaining variables will be ignored if there are fewer variables than array elements. The additional variables will be set to NULL if there are more variables than array elements. The list() construct only supports indexed arrays and does not work with associative arrays. For associative arrays, you need to extract the values first. In this PHP List Example, we assign multiple variables at once using the list() construct. Click Execute to run the PHP List Example online and see the result.
How to concatenate array elements in PHP using implode() function?
PHP's built-in implode() function concatenates array elements into a string using a specified delimiter. It returns a string resulting from joining the array elements separated by the provided string. To use the implode() function, you should pass two arguments: the string you want to use as the delimiter and the array you want to concatenate. If you pass only one argument (an array), PHP will automatically use the empty string as the delimiter. The implode() function does not change the original array. In this PHP Implode Example, we concatenate array elements using a comma as a separator. Click Execute to run the PHP Implode Example online and see the result.
How to iterate an array in PHP using foreach?PHP Code Snippet
The foreach loop statement in PHP offers an elegant way to iterate through arrays. PHP supports two syntaxes for iterating over associative and indexed arrays. Use the foreach($array as $value) syntax for indexed arrays and the foreach($array as $key => $value) syntax for associative arrays. In this PHP Foreach Example, we iterate over an array and print all its values. Click Execute to run the PHP Foreach Example online and see results.