What are the commonly used methods in php?

Commonly used methods in php are: 1. [list()] assign the values ​​in the array to some variables; 2. [explode()] convert the string into an array; 3. [file_get_contents()] Read the entire file into a string; 4. [end()] gets the last parameter of the array.

Commonly used methods in php are:

1. list()Put the array into Assign the value to some variables:

$my_array = array("Dog","Cat","Horse");
list($a, $b, $c) = $my_array;//或者
list($a, , $c) = $my_array;

2. explode()Convert the string into an array

$str = 'one,two,three,four';
// 零 limit
print_r(explode(',',$str,0));
// 正的 limit
print_r(explode(',',$str,2));
// 负的 limit
print_r(explode(',',$str,-1));

3.end()Get The last parameter of the array can only be variables and cannot contain methods.

4.file_get_contents()Read the entire file into a string.

5.is_uploaded_file() Determine whether the file is uploaded through HTTP POST.

6.move_uploaded_file()Move the uploaded file to a new location and save it.

7.file_exists()Check whether the file or directory exists.

8.mkdir($path,0777) Create a new directory chmod($path,0777) Rename the file mode and permissions.

9. Receive XML data using php:// .

     <?php
         $xmldata=file_get_contents("php://input");
        $data=simplexml_load_string($xmldata);
         print_r($data);
    ?>

10. String and array conversion.

$array = array('lastname', 'email', 'phone');
 $comma_separated = implode(",", $array);
 echo $comma_separated; // lastname,email,phone
 $pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
 echo $pieces[0]; // piece1
echo $pieces[1]; // piece2

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