What are the loop statements in php

The following loop statements are provided in PHP: while: Repeat the code block when the condition is true. do-while: Execute the code block first, then check whether the condition is true, and continue executing the loop if it is true. for: Initialize the variable, check the condition, execute the code block, and then increment the variable. foreach (array): Loops through the elements in the array and provides the key and value. foreach (object): Loops through the properties in the object and provides property names and values.

Loop statements in PHP

PHP provides a variety of loop statements that are used to perform loop statements when certain conditions are met. block of code is executed repeatedly. These loop statements include:

while loop

• Syntax: while (condition)
• Repeatedly execute the code block , as long as the condition is true.

do-while loop

• Syntax: do {...} while (condition);
• Execute the code block first, then check whether the condition is true, and if it is true, continue to execute the loop.

for loop

• Syntax: for (initialization; condition; increment)
• Initialize variables , checks the condition, executes the code block, and then increments the variable.

foreach loop

• Syntax: foreach ($array as $key => $value)
• Loop through the elements in the array, providing keys and values ​​as needed.

foreach loop (object)

• Syntax: foreach ($object as $property => $value)
• Loop through the properties in the object and provide property names and values ​​as needed.

break statement

• is used to exit immediately from the loop.

continue statement

• is used to skip the current iteration of the loop and continue executing the next iteration.

Example:

// while 循环
$i = 0;
while ($i < 10) {
    echo $i . "\n";
    $i++;
}

// for 循环
for ($i = 0; $i < 10; $i++) {
    echo $i . "\n";
}

// foreach 循环（数组）
$array = ['foo', 'bar', 'baz'];
foreach ($array as $item) {
    echo $item . "\n";
}

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