What is the usage of foreach in php

The usage of foreach in php is: [foreach ($array as $value) {To execute code;}], every time a loop is performed, the value of the current array element will be assigned to the $value variable. The next time you go through the loop, you get the next value in the array.

The foreach loop is used to traverse the array.

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Grammar format:

foreach ($array as $value) {
	要执行代码;
}

Each time a loop is performed, the value of the current array element will be assigned Give the $value variable (the array pointer will move one by one), and the next time you loop through it, you will see the next value in the array.

foreach ($array as $key => $value) {
	要执行代码;
}

Every time you loop, the keys and values ​​of the current array elements will be assigned to the $key and $value variables (the numeric pointers will move one by one). When you perform the next loop, you will see the array. The next key and value in .

Example:

<?php
$x=array("Gooooo","Runrun","Taotao");
foreach ($x as $value) {
	echo $value . PHP_EOL;
}
?>

Example:

<?php
$x=array(1=>"Gooooo", 2=>"Runrun", 3=>"Taotao");
foreach ($x as $key => $value) {
	echo "key  为 " . $key . "，对应的 value 为 ". $value . PHP_EOL;
}
?>

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