The following is a sample code that demonstrates how to reassign all traversed $b to $c in the form of a string:

php & lt？ Server-side programming language (abbreviation of professional hypertext preprocessor)

$a = [ 1，2，3，4，5]；

$ c =// Initializes an empty string variable

foreach ($a as $b) {

echo $ b；

$ c . = $ b； //Append the value of each traversal to the string variable.

}

echo $ c； //The output append operation uses the string concatenation operator`. =`, which connects the current string variable with the string to be appended.

Finally, we use the echo statement to output the reassigned string variable ` $ c'.