What does php foreach mean?

foreach means "loop traversal", which is based on the syntax in the PHP programming environment. It is mainly used to loop through arrays. After PHP5, it can also traverse objects. The foreach statement traverses the array regardless of the array subscript, and can be used for discontinuous index arrays and associative arrays with strings as subscripts. The syntax is "foreach ($array as [$key =>] $value){statement block; }".

The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer

foreach means "loop traversal" and is based on php Syntax in a programming environment, mainly used to loop through arrays.

foreach is a statement specially designed for traversing arrays. It is a commonly used method when traversing arrays. It provides great convenience in traversing arrays. After PHP5, you can also traverse objects (foreach can only be applied to arrays and object).

The foreach statement traverses the array regardless of the array subscript, and can be used for discontinuous index arrays and associative arrays with strings as subscripts.

foreach statement analysis

Let’s first take a look at the foreach statement, which has two syntax formats:

Grammar format 1:

foreach ($array as $value){
    语句块;
}

Traverse the given $array array, and assign the value of the current array to $value## in each loop #.

Syntax format 2:

foreach ($array as $key => $value){
    语句块;
}

Traverse the given

$array array, and assign the value of the current array to $value, the key name is assigned to $key.

Explanation:

When the foreach statement loops, the pointer inside the array will move forward one step, so that the next array element will be obtained in the next loop. Stop traversing and exit the loop until it reaches the end of the array.

foreach array traversal example

See how the foreach statement traverses the array.

Instance 1:

######

<?php
header("Content-type:text/html;charset=utf-8");
$array= array("香蕉","苹果","梨子","橙子","橘子","榴莲");
foreach ($array as $value) { 
    echo $value . "<br/>";
} 
?>

###Output: ##################Instance 2: ## ####

<?php
header("Content-type:text/html;charset=utf-8");
$array= array("香蕉","苹果","梨子","橙子","橘子","榴莲");
foreach ($array as $key => $value) { 
    echo "键名为：".$key."，键值为：".$value . "<br/>";
} 
?>

###Output: ############### Recommended learning: "###PHP Video Tutorial###"###

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