Dynamic query php/ mysql - php

Question

I have some issues with a dynamic query:
$cond = array();
if (!empty($type_contrat)) {
$cond[] = "job_offers.type_contrat = '$type_contrat'";
}
if (!empty($categorie_poste)) {
$cond[] = "job_offers.cat_poste = '$categorie_poste'";
}
if (!empty($niveau_etudes)) {
$cond[] = "job_offers.qualifications = '$niveau_etudes'";
}
if (!empty($experience)) {
$cond[] = "job_offers.experience >= '$experience'";
}
if (count($cond)) {
$query = $mysqli->query('SELECT
job_offers.ref_org,
job_offers.titre,
job_offers.qualifications,
job_offers.experience,
job_offers.cat_poste,
job_offers.type_contrat,
job_offers.taux_occupation,
job_offers.lieu_affectation,
job_offers.pays,
job_offers.url,
job_offers.date_entered,
job_offers.date_expire,
organisations.ref_org,
organisations.name_organisation
FROM job_offers,organisations
WHERE job_offers.ref_org = organisations.ref_org AND ');
$query .= implode(' AND ', $cond);
}
print_r($query);
--> result: prints only (linebreaks added for readability):
job_offers.type_contrat = '1' AND
job_offers.cat_poste = '3' AND
job_offers.qualifications = '2' AND
job_offers.experience >= '1'
and therefore no result.

Answer 1

You are trying to append a string to a mysqli-result object...
Check the returnvalue of the mysqli->result() function here.
Since someone is keen on removing this answer; here's your solution:
$cond = array();
if (!empty($type_contrat)) {
$cond[] = "job_offers.type_contrat = '$type_contrat'";
}
if (!empty($categorie_poste)) {
$cond[] = "job_offers.cat_poste = '$categorie_poste'";
}
if (!empty($niveau_etudes)) {
$cond[] = "job_offers.qualifications = '$niveau_etudes'";
}
if (!empty($experience)) {
$cond[] = "job_offers.experience >= '$experience'";
}
if (count($cond)) {
$query = $mysqli->query('SELECT
job_offers.ref_org,
job_offers.titre,
job_offers.qualifications,
job_offers.experience,
job_offers.cat_poste,
job_offers.type_contrat,
job_offers.taux_occupation,
job_offers.lieu_affectation,
job_offers.pays,
job_offers.url,
job_offers.date_entered,
job_offers.date_expire,
organisations.ref_org,
organisations.name_organisation
FROM job_offers,organisations
WHERE job_offers.ref_org = organisations.ref_org AND '.implode(' AND ', $cond));
}
print_r($query);