The difference in usage between php implode() function and explode() function

The explode() function in

php is: use one string to split another string and return an array composed of strings. The implode() function returns a string composed of array elements. These two functions are

mutual conversion functions between strings and arrays.

First of all, from the usage point of view, one is to connect array elements into strings, and the other is to split strings into arrays. So the usage is different.

Then there are differences in the parameters received. Due to historical reasons, explode() cannot accept two parameter orders. It must ensure that the separator parameter comes before the string parameter;

And implode() can accept two parameter orders.

Example

implode() connection function:

 1, 'b'=>2, 'c'=>3, 'd'=>4);
$string = implode("-",$array);
   echo $string;
?>

with running results As shown below:

##explode() split function:

";
print_r($array);
?>

The explode() method is often used to enter multiple options, separate them with specific delimiters, and convert them into an array.

implode() converts the array into a string. When constructing the sql statement, for example

insert into table (col1,col2,col3) values('value1','value2','value3')

, this construction can become simpler

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