FormIt : custom validator to validate numbers in input (solved)

$pattern = '`^[[:digit:]]{14}$`'; // accepts only 14 numbers (no letters, no space etc...)
if(!preg_match($pattern, $value)){
   $validator->addError('yourfieldname','your error message'); // error message if the value does not matche the pattern
   return false;
}

<?php
$pattern = '`^[[:digit:]]{14}$`'; // accepts only 14 numbers (no letters, no space etc...)
if(!preg_match($pattern, $value)){
   $validator->addError('N° SIRET','Le n° SIRET doit contenir 14 chiffres'); // error message if the value does not matche the pattern
   return false;
}

<?php
$value = (float)$value;
$pattern = '`^[[:digit:]]{14}$`';
$success = preg_match($pattern, $value);
if (!$success) {
  // Note how we can add an error to the field here.
  $validator->addError('N° SIRET','Le n° SIRET doit contenir 14 chiffres');
}
return $success;

[[!FormIt? 
     &hooks=`spam,email,redirect`
     &emailSubject=`Nouvelle inscription`
     &emailTpl=`formItInscriptionAnnonceur`
     &emailTo=`[email protected]`
     &redirectTo=`17`
     &customValidators=`isBigEnough`
     &validate=`pagetitle:required,
                societe_siret:isBigEnough`
]]
 
<p>[[+fi.error.error_message]]</p>
<form class="form" action="[[~[[*id]]]]" method="post">
    <input name="nospam:blank" type="hidden" />
    <input name="resource_id" type="hidden" value="[[+fi.id]]" />
 

    <div class="champ">
      <label for="form_pagetitle"><span class="req">*</span>Nom de votre enseigne : 
          <span class="error">[[!+fi.error.pagetitle]]</span>
      </label>
      <input type="text" name="pagetitle" id="form_pagetitle" value="[[!+fi.pagetitle]]" />
    </div>

    <div class="champ">
      <label for="form_siret"><span class="req">*</span>N° SIRET : 
          <span class="error">[[!+fi.error.societe_siret]]</span>
      </label>
      <input type="text" name="societe_siret" id="form_siret" value="[[!+fi.societe_siret]]" />
    </div>

<?php
$modx->log(modX::LOG_LEVEL_ERROR, 'in my validator' ); // just to be sure you fire the validator

$pattern = '`^[[:digit:]]{14}$`'; // accepts only 14 numbers (no letters, no space etc...)

$modx->log(modX::LOG_LEVEL_ERROR, 'value :' .$value); // this line only to return the input value in your error log
if(!preg_match($pattern, $value){
   $validator->addError('siret','Le SIRET doit contenir uniquement 14 chiffres.');
   return false;
}else{
$modx->log(modX::LOG_LEVEL_ERROR, 'SIRET OK'); // this line is returned in your error log if the siret is 14 numbers only
}

return true;

[[!FormIt? 
     &hooks=`spam,email,redirect`
     &emailSubject=`Nouvelle inscription`
     &emailTpl=`formItInscriptionAnnonceur`
     &emailTo=`[email protected]`
     &redirectTo=`17`
     &customValidators=`vSiret`
     &validate=`pagetitle:required,
                societe_siret:vSiret`
]]

$validator->addError('siret',

$validator->addError('societe_siret',