How can I do two foreach loops in php at the same time

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9 Answers

foreach
90%

I have two nested foreach loops:,There is no need to use nested loops:, By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. ,The issue here is you're not structuring your data in a format that will make parsing it as you want easy. If you use a single associative array instead of multiple arrays per class you'll find your job is a lot easier.

There is no need to use nested loops:

$ren1 = array("class ConcreteClass1", "class hello");
$ren2 = array("class ConcreteClass2", "class bye");

if (!empty($ren1) && !empty($ren2)) {
   foreach($ren1 as $key => $value) {
      echo "Class renamed: ".$ren1[$key].
      " ==> ".$ren2[$key].
      "\n";
   }
}
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88%

Note − If there are more than 2 arrays, nested ‘foreach’ loops can be used.,Here, 2 arrays have been declared and they are being traversed using the ‘foreach’ loop. The result is that the respective index of every array is matched and the data at those indices are displayed one next to the other.,The ‘foreach’ loop can be used to multiple index variables of two arrays. This has been shown below −,How to use PowerShell break statement in foreach loop?

<?php
$FirstArray = array('aB', 'PQ', 'cd', 'pm');
$SecondArray = array('12', '34', '90', '49');
foreach($FirstArray as $index => $value) {
   echo $FirstArray[$index].$SecondArray[$index];
   echo "<br/>";
}
?>
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72%

The language is PHP. I have one foreach ( $a as $b) and another foreach ($c as $d => $e). How do i combine them to read as one. I tired foreach (($a as $b) && ($c as $d => $e)), but that is rubbish. ,each() will advance the array pointer of $c on each iteration. ,I don't understand what you're trying to do. If you want to reach them one after the other just use two loops:,I guess you could do something like:

e.g.

// ArrayIterator is just an example, could be any Iterator.
$a1 = new ArrayIterator(array(1, 2, 3, 4, 5, 6));
$a2 = new ArrayIterator(array(11, 12, 13, 14, 15, 16));

$it = new MultipleIterator;
$it - > attachIterator($a1);
$it - > attachIterator($a2);

foreach($it as $e) {
   echo $e[0], ' | ', $e[1], "\n";
}

prints

1 | 11
2 | 12
3 | 13
4 | 14
5 | 15
6 | 16
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65%

How do I handle using multiple foreach loops? Currently I have:,Can you post the code that is above (where your getting the contents of the $value and $info arrays from)?,How do I combine these arrays for an insert?,This code assumes that $info[0] corresponds to $value[0], etc etc.

How do I handle using multiple foreach loops? Currently I have:

foreach($th as $t_file)
foreach($orig as $file) {
   ...
}
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75%

It is possible to iterate over an array of arrays and unpack the nested array into loop variables by providing a list() as the value. , For example: , You can provide fewer elements in the list() than there are in the nested array, in which case the leftover array values will be ignored: , The foreach construct provides an easy way to iterate over arrays. foreach works only on arrays and objects, and will issue an error when you try to use it on a variable with a different data type or an uninitialized variable. There are two syntaxes:

foreach(iterable_expression as $value)
statement
foreach(iterable_expression as $key => $value)
statement
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40%

The foreach loop works only on arrays, and is used to loop through each key/value pair in an array.,The foreach loop - Loops through a block of code for each element in an array.,The following example will output both the keys and the values of the given array ($age):,For every loop iteration, the value of the current array element is assigned to $value and the array pointer is moved by one, until it reaches the last array element.


The foreach loop - Loops through a block of code for each element in an array.

foreach
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22%

I have two foreach loops: 1st one:,If you iterate an array by reference instead, a separation will be performed at the start of the loop. If the array is currently used in more than one place, this separation will lead to a copy.,The question is how to make those two loops to display results like this:

I have two foreach loops: 1st one:

        foreach ($items as $key => $item) 
        {   
        $keywords = explode(' ', $qsvarus);
        $title[$key] = preg_replace('/b('.implode('|', $keywords).')b(?![^<]*[>])/i', '<b>$0</b>', $title[$key]);
        $infoo[$key] = preg_replace('/b('.implode('|', $keywords).')b(?![^<]*[>])/i', '<b>$0</b>', $infoo[$key]);
        echo '<tr><td>'.$title[$key].$infoo[$key].$item.'</tr></td>';
}

2nd one:

foreach ($linkai as $key => $linkas) {
    $i++;
    $a1 = $linkas[1];
$a2 = str_replace("download/", "files/", $a1);
$a3 = str_replace("&","&amp;", $a2);
$a4 = str_replace("amp;nbsp;","nbsp;", $a3);
echo "<div class="bgframe".str_replace("/i/", "/IMG/", $a4)."</div></div>";
}

The question is how to make those two loops to display results like this:

Result1 from Loop1
Result1 from Loop2
Result2 from Loop1
Result2 from Loop2
Result3 from Loop1
Result3 from Loop2
And so on...

Instead of:

Result1 from Loop1
Result2 from Loop1
Result3 from Loop1
   ...
   Result1 from Loop2
Result2 from Loop2
Result3 from Loop2
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60%

Then we increment our counter with $i++. This is the same as $i = i + 1 , so $i will effectively increment each time the loop runs until it becomes 10, which can be seen when the application runs in the browser.,The for loop is a nice, compact version of the while loop which doesn’t allow us to forget to set or increment/decrement the counter.,The example above is the same as the while and do-while loops.,The first expression sets up the counter ($i = 1) In the while loop this counter was outside and above the loop.

< ? php

   // for every user in the database
   // send email

   ?
   >
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48%

The foreach loop is considered to be much better in performance to that of the generic for loop.,foreach Loop: The purpose of foreach loop is to define the use and it specifically iterate over the elements of the array data structure.Syntax:  ,The foreach loop though iterates over an array of elements, the execution is simplified and finishes the loop in less time comparatively.,The each parameters of for loop have the unique functionalities which are explained below for better understanding: 

Syntax:  

for (initialization; condition; increment / decrement) {
   // Set of Code to be iterated and executed
}

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5 GeeksforGeeks

foreach Loop: The purpose of foreach loop is to define the use and it specifically iterate over the elements of the array data structure.
Syntax:  

foreach($array as $element) {
   // PHP Code to be executed
}

 

foreach($array as $key => $element) {
   // PHP Code to be executed
}
Output:
Jimmy
Jonny
Jacky
Output:
name: Robert
email: robert112233 @mail.com
age: 18
gender: male
Output
for loop evaluates to: 0.002861
foreach loop evaluates to: 0.002861
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